tRestClient returns BadRequestException

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tRestClient returns BadRequestException

Here is what the log shows. The message sent to webservice:

ID: 1
Address: http://localhost:8081/api/users
Http-Method: POST
Content-Type: application/json
Headers: {Content-Type=, Accept=, Authorization=}

It passes the header information successfully. However I do not see the payload being sent to the webservice.  The webservice returned this error message:
ID: 1
Response-Code: 400
Encoding: UTF-8
Content-Type: application/json; charset=utf-8
Headers: {Access-Control-Allow-Headers=, Cache-Control=, Content-Length=, content-type=, Date=, ETag=, Expires=, Pragma=, Server=, Vary=, X-Powered-By=, X-SourceFiles=, X-UA-Compatible=}
Payload: {"status":"error","message":"wrong json format - must br as array"}

This is how I have linked the objects:
In the Input Schema of the trestclient, I have mapped the output from twritejsonfield to one column output. 
Is this how a payload is passed from a previous component to trestclient?

Re: tRestClient returns BadRequestException

We have replied to your another topic:
Please stick to one topic so that we can pay individule attention to it.
Best regards
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