How to see the value of Saved Variable

I have 2 APIs to be executed:


The implementation of these APIs are:

//Generate URL
val generateUrl = http("Generate URL")
  .header("Content-Type", "application/json")
  .check(status is 200)

//Processes URL
val processUrl = http("Process URL")
  .formParam("pspReturnBackUrl", "${return_url}")
  .check(status is 200)

The Json Response of 'generateUrl' looks like below:

When I use this in next api call, it throws 400 instead of 200.

Is there a way I can log the value of 'return_url'?

exec(session =>{