diff --git a/guides/plugins/plugins/administration/using-data-handling.md b/guides/plugins/plugins/administration/using-data-handling.md
index 75d4bf325..e81ffc4c1 100644
--- a/guides/plugins/plugins/administration/using-data-handling.md
+++ b/guides/plugins/plugins/administration/using-data-handling.md
@@ -696,6 +696,323 @@ Shopware.Component.register('swag-basic-example', {
 });
 ```
 
+#### Working with entity extensions
+
+The following example shows how to pass on and save data of entity extensions.
+
+```javascript
+import template from './swag-paypal-pos-wizard.html.twig';
+import './swag-paypal-pos-wizard.scss';
+import {
+    PAYPAL_POS_SALES_CHANNEL_EXTENSION,
+    PAYPAL_POS_SALES_CHANNEL_TYPE_ID,
+} from '../../../../../constant/swag-paypal.constant';
+
+const { Component, Context } = Shopware;
+const { Criteria } = Shopware.Data;
+
+Component.extend('swag-paypal-pos-wizard', 'sw-first-run-wizard-modal', {
+    template,
+
+    inject: [
+        'SwagPayPalPosApiService',
+        'SwagPayPalPosSettingApiService',
+        'SwagPayPalPosWebhookRegisterService',
+        'salesChannelService',
+        'repositoryFactory',
+    ],
+
+    mixins: [
+        'swag-paypal-pos-catch-error',
+        'notification',
+    ],
+
+    data() {
+        return {
+            showModal: true,
+            isLoading: false,
+            salesChannel: {},
+            cloneSalesChannelId: null,
+            stepperPages: [
+                'connection',
+                'connectionSuccess',
+                'connectionDisconnect',
+                'customization',
+                'productSelection',
+                'syncLibrary',
+                'syncPrices',
+                'finish',
+            ],
+            stepper: {},
+            currentStep: {},
+        };
+    },
+
+    metaInfo() {
+        return {
+            title: this.wizardTitle,
+        };
+    },
+
+    computed: {
+        displayStepperPages() {
+            return this.stepperPages.filter((item) => {
+                return item !== 'connectionDisconnect';
+            });
+        },
+
+        stepInitialItemVariants() {
+            const maxNavigationIndex = this.stepperPages.length;
+            const { navigationIndex } = this.currentStep;
+            const navigationSteps = [];
+
+            for (let i = 1; i <= maxNavigationIndex; i += 1) {
+                if (i < navigationIndex) {
+                    navigationSteps.push('success');
+                } else if (i === navigationIndex) {
+                    navigationSteps.push('info');
+                } else {
+                    navigationSteps.push('disabled');
+                }
+            }
+            return navigationSteps;
+        },
+
+        paypalPosSalesChannelRepository() {
+            return this.repositoryFactory.create('swag_paypal_pos_sales_channel');
+        },
+
+        salesChannelRepository() {
+            return this.repositoryFactory.create('sales_channel');
+        },
+
+        salesChannelCriteria() {
+            return (new Criteria(1, 500))
+                .addAssociation(PAYPAL_POS_SALES_CHANNEL_EXTENSION)
+                .addAssociation('countries')
+                .addAssociation('currencies')
+                .addAssociation('domains')
+                .addAssociation('languages');
+        },
+
+        wizardTitle() {
+            const params = [
+                this.$tc('global.sw-admin-menu.textShopwareAdmin'),
+                this.$tc('swag-paypal-pos.general.moduleTitle'),
+                this.title,
+            ];
+
+            return params.reverse().join(' | ');
+        },
+    },
+
+    watch: {
+        '$route'(to) {
+            this.handleRouteUpdate(to);
+        },
+    },
+
+    mounted() {
+        this.mountedComponent();
+    },
+
+    methods: {
+        handleRouteUpdate(to) {
+            const toName = to.name.replace('swag.paypal.pos.wizard.', '');
+
+            this.currentStep = this.stepper[toName];
+        },
+
+        createdComponent() {
+            this.generateStepper();
+
+            const salesChannelId = this.$route.params.id;
+            if (salesChannelId) {
+                this.loadSalesChannel();
+                return;
+            }
+
+            this.createNewSalesChannel();
+        },
+
+        mountedComponent() {
+            const step = this.$route.name.replace('swag.paypal.pos.wizard.', '');
+            this.currentStep = this.stepper[step];
+        },
+
+        generateStepper() {
+            let index = 1;
+            this.stepper = this.stepperPages.reduce((accumulator, pageName) => {
+                if (pageName === 'connectionDisconnect') {
+                    index -= 1;
+                }
+
+                accumulator[pageName] = {
+                    name: `swag.paypal.pos.wizard.${pageName}`,
+                    variant: 'large',
+                    navigationIndex: index,
+                };
+
+                if (index === 1) {
+                    this.currentStep = accumulator[pageName];
+                }
+                index += 1;
+
+                return accumulator;
+            }, {});
+        },
+
+        onCloseModal() {
+            if (!this.salesChannel._isNew && (this.$route.params.id || this.salesChannel.id)) {
+                this.routeToDetailOverview();
+
+                return;
+            }
+
+            this.routeToDashboard();
+        },
+
+        onFinishWizard() {
+            this.routeToDetailOverview(true);
+        },
+
+        routeToDashboard() {
+            this.showModal = false;
+
+            this.$nextTick(() => {
+                this.$router.push({ name: 'sw.dashboard.index' });
+            });
+        },
+
+        routeToDetailOverview(finished = false) {
+            this.showModal = false;
+
+            this.save(finished).then(() => {
+                if (finished) {
+                    this.SwagPayPalPosApiService.startCompleteSync(this.salesChannel.id);
+                }
+
+                this.$router.push({
+                    name: 'swag.paypal.pos.detail.overview',
+                    params: { id: this.salesChannel.id },
+                });
+            });
+        },
+
+        save(activateSalesChannel = false, silentWebhook = false) {
+            if (activateSalesChannel) {
+                this.salesChannel.active = true;
+            }
+
+            return this.salesChannelRepository.save(this.salesChannel, Context.api).then(async () => {
+                this.isLoading = false;
+                this.isSaveSuccessful = true;
+                this.isNewEntity = false;
+
+                this.$root.$emit('sales-channel-change');
+                await this.loadSalesChannel();
+
+                this.cloneProductVisibility();
+                this.registerWebhook(silentWebhook);
+            }).catch(() => {
+                this.isLoading = false;
+
+                this.createNotificationError({
+                    message: this.$tc('sw-sales-channel.detail.messageSaveError', 0, {
+                        name: this.salesChannel.name || this.placeholder(this.salesChannel, 'name'),
+                    }),
+                });
+            });
+        },
+
+        registerWebhook(silent = false) {
+            const webhookPromise = this.SwagPayPalPosWebhookRegisterService.registerWebhook(this.salesChannel.id);
+
+            if (!silent) {
+                return webhookPromise.catch(this.catchError.bind(this, 'swag-paypal-pos.messageWebhookRegisterError'));
+            }
+
+            return webhookPromise;
+        },
+
+        cloneProductVisibility() {
+            if (this.cloneSalesChannelId === null) {
+                return;
+            }
+
+            this.SwagPayPalPosSettingApiService.cloneProductVisibility(
+                this.cloneSalesChannelId,
+                this.salesChannel.id,
+            ).catch((errorResponse) => {
+                if (errorResponse.response.data && errorResponse.response.data.errors) {
+                    this.createNotificationError({
+                        message: this.$tc('swag-paypal-pos.messageCloneError'),
+                    });
+                }
+            });
+        },
+
+        createNewSalesChannel() {
+            if (Context.api.languageId !== Context.api.systemLanguageId) {
+                Context.api.languageId = Context.api.systemLanguageId;
+            }
+
+            this.previousApiKey = null;
+            this.salesChannel = this.salesChannelRepository.create(Context.api);
+            this.salesChannel.typeId = PAYPAL_POS_SALES_CHANNEL_TYPE_ID;
+            this.salesChannel.name = this.$tc('swag-paypal-pos.wizard.salesChannelPrototypeName');
+            this.salesChannel.active = false;
+
+            this.salesChannel.extensions.paypalPosSalesChannel
+                = this.paypalPosSalesChannelRepository.create(Context.api);
+
+            Object.assign(
+                this.salesChannel.extensions.paypalPosSalesChannel,
+                {
+                    mediaDomain: '',
+                    apiKey: '',
+                    imageDomain: '',
+                    productStreamId: null,
+                    syncPrices: true,
+                    replace: 0,
+                },
+            );
+
+            this.salesChannelService.generateKey().then((response) => {
+                this.salesChannel.accessKey = response.accessKey;
+            }).catch(() => {
+                this.createNotificationError({
+                    message: this.$tc('sw-sales-channel.detail.messageAPIError'),
+                });
+            });
+        },
+
+        loadSalesChannel() {
+            const salesChannelId = this.$route.params.id || this.salesChannel.id;
+            if (!salesChannelId) {
+                return new Promise((resolve) => { resolve(); });
+            }
+
+            this.isLoading = true;
+            return this.salesChannelRepository.get(salesChannelId, Shopware.Context.api, this.salesChannelCriteria)
+                .then((entity) => {
+                    this.salesChannel = entity;
+                    this.previousApiKey = entity.extensions.paypalPosSalesChannel.apiKey;
+                    this.isLoading = false;
+                });
+        },
+
+        updateCloneSalesChannel(cloneSalesChannelId) {
+            this.cloneSalesChannelId = cloneSalesChannelId;
+        },
+
+        toggleLoading(state) {
+            this.isLoading = state;
+        },
+    },
+});
+```
+
 ## Next steps
 
-As this is very similar to the DAL it might be interesting to learn more about that. For this, head over to the section about the [data handling](../framework/data-handling/) in PHP.
+As this is very similar to the DAL it might be interesting to learn more about that. For this, head over to the section about the [data handling](../framework/data-handling/) in PHP.
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