i update the work package using "edit work package - apiv3".  I have a issue api not work.

I update that using body and header below data. 

{
      "subject":"swaat TYPE 1 AND STATUS 2 SET ALSO PRIORITY IS 6 123",
   "description": {
       "format": "textile",
       "raw": "Task assign for the swaat Data"
   },
      "_links": {
       "type": {"href":"/api/v3/types/1"},
       "status":{"href":"/api/v3/statuses/1"},
       "priority":{"href":"/api/v3/priorities/6"}
   }
}

please give some solution about this issue.