Error "type cannot be empty" in request call "Merge incidents"

Hi. I am testing the APIs of INCIDENTS but getting an error “type cannot be empty” in the calls “Merge incidents”. The type in their body are already mentioned but still getting the same error.
Kindly guide me if I am doing anything wrong or is there any other issue with the call?
the screenshot is attached below.

Hello Sibqo,

Please review the document around the Manage Incident API call and let us know the actual call you are attempting.
It would also help if you can provide the cURL statement, without the API Token.

Regards,

Try type = incident_reference.