Fix outbox projection http json

daprdocs/content/en/developing-applications/building-blocks/state-management/howto-outbox.md

@@ -110,11 +110,11 @@ spec:
 
 ### Shape the outbox pattern message
 
-You can override the outbox pattern message published to the pub/sub broker by setting a different message. This is done via a projected transaction payload, called `outboxProjections`, which is ignored when the state is written and is used as the outbox pattern message published to the user topic.
+You can override the outbox pattern message published to the pub/sub broker by setting another transaction that is not be saved to the database and is explicitly mentioned as a projection. This transaction is added a metadata key named `outbox.projection` with a value set to `true`. When added to the state array saved in a transaction, this payload is ignored when the state is written and the data is used as the payload sent to the upstream subscriber.
 
-To set the `outboxProjections` to `true`, the `key` values must match between the operation on the state store and the message projection. If the keys do not match, the whole transaction fails.
+To use correctly, the `key` values must match between the operation on the state store and the message projection. If the keys do not match, the whole transaction fails.
 
-If you have two or more `outboxProjections` for the same key, the first one defined is used and the others are ignored. 
+If you have two or more `outbox.projection` enabled state items for the same key, the first one defined is used and the others are ignored. 
 
 [Learn more about default and custom CloudEvent messages.]({{< ref pubsub-cloudevents.md >}})
 
@@ -368,26 +368,33 @@ You can pass the message override using the following HTTP request:
 curl -X POST http://localhost:3500/v1.0/state/starwars/transaction \
   -H "Content-Type: application/json" \
   -d '{
-        "operations": [
-          {
-            "operation": "upsert",
-            "request": {
-              "key": "key1",
-              "value": "2"
-            }
-          },
-          {
-            "operation": "upsert",
-            "request": {
-              "key": "key1"
-              "value: "3"
-              "metadata": {
-                 "outboxProjection": "true"
-              }
-            }
-          }
-        ],
-      }'
+  "operations": [
+    {
+      "operation": "upsert",
+      "request": {
+        "key": "order1",
+        "value": {
+            "orderId": "7hf8374s",
+            "type": "book",
+            "name": "The name of the wind"
+        }
+      }
+    },
+    {
+      "operation": "upsert",
+      "request": {
+        "key": "order1",
+        "value": {
+            "orderId": "7hf8374s"
+        },
+        "metadata": {
+           "outbox.projection": "true"
+        },
+        "contentType": "application/json"
+      }
+    }
+  ]
+}'
 ```
 
 By setting the metadata item `"outbox.projection"` to `"true"` and making sure the `key` values match (`key1`):