```URI and payload, (PUT or POST): /callbacks/<id> <json messages>```<br>
```response: OK 200 or 500 for other errors```
>Fetch one message for an id from CR<br>
```URI and payload, (PUT or POST): /callbacks/<id> <json messages>```<br>
```response: OK 200 or 500 for other errors```
>Fetch one message for an id from CR<br>