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/AssignRoles HTTP/1.1 
Host: partnerhub.pbsdealers.com 
Content-Type: application/json
Content-Length: length
{"UserName":"String","Permissions":["String"],"Roles":["String"]}
 
HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: length
{"AllRoles":["String"],"AllPermissions":["String"],"ResponseStatus":{"ErrorCode":"String","Message":"String","StackTrace":"String","Errors":[{"ErrorCode":"String","FieldName":"String","Message":"String"}]}}