如何通过Microsoft Graph API在计划中添加任务

我想知道如何使用Microsoft Graph API在Planner计划中创建任务。现在我试图在使用“Create task”API的计划器计划中完成任务，但是我得到了UnknownError。如何通过Microsoft Graph API在计划中添加任务

{ 
    "error": { 
     "code": "UnknownError", 
     "message": "", 
     "innerError": { 
      "request-id": "2303b87d-fb0c-431c-9336-c93908758d25", 
      "date": "2016-06-28T10:16:56" 
     } 
    } 
}

正如文档中所描述的那样，我发布到api这样。

POST https://graph.microsoft.com/beta/tasks 
Content-type: application/json 
Content-length: 192 
{ 
    "assignedTo": "<I set my uuid>", 
    "planId": "<I set planId which I created>", 
    "bucketId": "<I set bucketId which is included the plan>", 
    "title": "test4", 
    "orderHint": "A" 
}

任何想法，我哪里会出错？如果您知道如何在Planner计划中添加任务，请分享这个想法？

来源

2016-06-28 Masayuki