Add MutateContentBlock mutation

client/src/graphql/gql/sandbox/mutations/defineActionPlan.gql

@@ -1,7 +0,0 @@
-mutation DefineActionPlan($input: DefineActionPlanInput!) {
-  defineActionPlan(input: $input) {
-    userModuleProgress {
-      id
-    }
-  }
-}

client/src/graphql/gql/sandbox/mutations/mutateContentBlock.gql

@@ -0,0 +1,22 @@
+mutation MutateContentBlock($input: MutateContentBlockInput!) {
+  mutateContentBlock(input: $input) {
+    contentBlock {
+      id
+      title
+      slug
+    }
+    errors
+  }
+}
+
+
+
+// input
+
+{
+  "input": {
+    "id": "Q29udGVudEJsb2NrTm9kZToyMQ==",
+    "type": "plain",
+    "title": "Hallo Daniel"
+  }
+}