Why does Postman show "Bad String" in this body of POST request : <p>As i was testing POST request on Postman with details shown in image. I am getting error when i Send this request.</p>

<blockquote>
  <p>{
      "FaultId": "Invalid post data, please correct the request",
      "fault": "FAULT_INVALID_POST_REQUEST"
  }</p>
</blockquote>

<p>Am i missing something.
Details:</p>

<p><a href="https://i.stack.imgur.com/Np9Zq.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Np9Zq.png" alt="Error"></a></p>
