title: How to read request's body in WSO2 ESB?
body: <p>Hi everyone I am new using WSO2 ESB, here is the issue I made a integration project to learn but I have not been able to read the body of my request when I try I see this warning &quot;Json Payload is empty&quot;
  <a href="https://i.stack.imgur.com/gV6Ub.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>Here is how I am trying to read the body <code>&lt;filter regex=&quot;[1-9]&quot; source=&quot;json-eval($.test)&quot;&gt;</code></p>
  <p><a href="https://i.stack.imgur.com/pvwSE.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>And finally here is my request, I already set the header <code>application/json</code></p>
  <p><a href="https://i.stack.imgur.com/hpk48.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>If anyone could help me, I would be very grateful.  Thanks in advance</p>