To override the Content-type in your clients HTTP Accept Header, append  the .json suffix or  ?format=json
To embed the response in a jsonp callback, append ?callback=myCallback
        
        HTTP + JSON
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /json/reply/SetMessagesAcknowledgedRequest HTTP/1.1 
Host: api.podapp.com.au 
Content-Type: application/json
Content-Length: length
{"messageIDs":["00000000000000000000000000000000"],"authToken":"00000000000000000000000000000000"}
 
HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: length
{"success":false,"errorMessage":"String","errorCode":0}