PUT http://localhost:8080/cmx/cs/localhost-orcl-DS_UI1/task/urn:b4p2:20210?action=complete

{
     "taskType": {"name":"Merge"},
     "taskId": "urn:b4p2:20210",
     "owner": "admin",
     "dueDate": "2015-08-14T17:00:00-07:00",
     "status": "OPEN",
     "priority": "NORMAL",
     "creator": "admin",
     "createDate": "2015-06-15T00:00:00",
     "updatedBy": "admin",
     "lastUpdateDate": "2015-06-15T00:00:00",
     "businessEntity": "Person",
     "orsId": "localhost-orcl-DS_UI1",
     "processId": "20208",
     "taskRecord": [{
       "businessEntity":{
         "name": "Person",
         "key":{
            "rowid": "233",
            "systemName": "",
            "sourceKey": ""
         }
       }
     }]
}