Robot Framework Post Request失败无法对非2元组的对象进行编码

Question

我有下面的Curl命令，可以从Swagger正常工作，但是当我在Robot Framework Requests库中尝试相同时-我收到“无法编码非2元组的对象”错误。我可能一直想念什么？

 curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' -d '{ \ 
 "dataMap": { \ 
 "TradeBus":{ \ 
 "trade": "Test001",  \ 
 "busCode": "op09", \ 
 "test": "XXX", \ 
 "sortOrder": "78654" \ 
 \ 
 }  \ 
 } \ 
 } \ 
 ' 'https://rxxxxxxx0cd.test.com:7223/service/rest/acct/TradeBus?skipValidation=false'

My Robot Test snippet:
*****************************
*** Variables ***
${Data}=                   ../Resources/CreateTrdbus.json

*** Test Cases ***
Sample webservice test

 ${data}=                       get file      ${Data}
 ${headers}=                    Create Dictionary   Content-type=application/json    Accept=application/json
 Create Session             tWs     https://rxxxxxxx0cd.test.com:7223/service/rest
 ${resp}=                       POST request    tWs     /acct/TradeBus/?skipValidation=false   headers=${headers}    data=${data}             
 Should Be Equal                ${resp.status_code}     ${200}       msg=WebService call failed 

And the Json file content set as below:
 {
  "dataMap": {
  "TradeBus":{
   "trade": "Test001", 
   "busCode": "op09",
   "test": "XXX",
   "sortOrder": "78654"
        } }  }