Issue in sending JSON data using custom action

I have a problem with sending JSON data using a custom action , While using a test run request at a time of creating a custom action It is sending JSON Data perfectly

But when data is passed on App realtime

Payload is sent a string,

Is there is any way to fix it?

Can you share a screenshot of how this is setup in the custom action?

We have fixed it, Issue is because of text input which is of multi-line, changed to a single line it worked perfectly.