diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 16d65af..4580220 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -25,7 +25,7 @@ This is an Ember app, so the usual steps follow:
     ```
 1. Run the app.
     ```bash
-    ember serve
+    npm run start
     ```
 1. Visit your app at [http://localhost:4200](http://localhost:4200).
 
diff --git a/snippets/updating-data/create-record/handler.js b/snippets/updating-data/create-record/handler.js
index 7e5e0f6..56baa52 100644
--- a/snippets/updating-data/create-record/handler.js
+++ b/snippets/updating-data/create-record/handler.js
@@ -18,10 +18,11 @@ const updatesHandler = {
 
     const { data, store } = context.request;
     const newRequestParams = Object.assign({}, context.request, {
-      body: serializeResources(
-        store.cache,
-        recordIdentifierFor(data.record)
-      )
+      body: JSON.stringify(
+        serializeResources(
+          store.cache,
+          data.record
+        ))
     });
     return next(newRequestParams);
   }
diff --git a/snippets/updating-data/save-record/handler.js b/snippets/updating-data/save-record/handler.js
index 125b343..1a90e29 100644
--- a/snippets/updating-data/save-record/handler.js
+++ b/snippets/updating-data/save-record/handler.js
@@ -1,5 +1,4 @@
 // Create handler for serialization of any record
-import { recordIdentifierFor } from '@ember-data/store';
 import { serializeResources } from '@ember-data/json-api/request';
 
 const updatesHandler = {
@@ -18,10 +17,10 @@ const updatesHandler = {
 
     const { data, store } = context.request;
     const newRequestParams = Object.assign({}, context.request, {
-      body: serializeResources(
+      body: JSON.stringify(serializeResources(
         store.cache,
-        recordIdentifierFor(data.record)
-      )
+        data.record
+      ))
     });
     return next(newRequestParams);
   }
diff --git a/tests/integration/components/guide-section/subsection-test.js b/tests/integration/components/guide-section/subsection-test.js
index 997e0e9..6c29c16 100644
--- a/tests/integration/components/guide-section/subsection-test.js
+++ b/tests/integration/components/guide-section/subsection-test.js
@@ -97,7 +97,7 @@ module('Integration | Component | guide-section/subsection', function (hooks) {
     assert
       .dom('[data-test-field="Subsection Description"]')
       .includesText(
-        'To create a new record using Ember Data you should use createRecord request and attach "body" to it. In case of JSON:API backend - you can user serializeResources request utility.'
+        'To create a new record using Ember Data you should use createRecord request and attach "body" to it. In case of JSON:API backend - you can use serializeResources request utility.'
       );
 
     const emberClassic = this.element.querySelector(
diff --git a/translations/updating-data/create-record/en-us.yaml b/translations/updating-data/create-record/en-us.yaml
index c03e200..1efc5d3 100644
--- a/translations/updating-data/create-record/en-us.yaml
+++ b/translations/updating-data/create-record/en-us.yaml
@@ -1,2 +1,2 @@
 title: createRecord
-description: To create a new record using Ember Data you should use <code>createRecord</code> request and attach <code>"body"</code> to it. In case of JSON:API backend - you can user <code>serializeResources</code> request utility.
+description: To create a new record using Ember Data you should use <code>createRecord</code> request and attach <code>"body"</code> to it. In case of JSON:API backend - you can use <code>serializeResources</code> request utility.