Does Creator API record update method work?

Does Creator API record update method work?

Urgently need to verify if updating a form via the API works.

Trying to follow the documentation, I am wanting in this case to update the Payment_Status field in the Invoicing_Record form for a single record

  1. https://creator.zoho.com/api/<owner>/json/<application name>/form/Invoicing_Record/record/update/?scope=creatorapi&authtoken=<xxxxxx>&criteria=(ID = "1612333000000810121")&Payment_Status=Paid in full
This request POSTS ok (200 response) but returns output of the Zoho Creator home page or something.

The record does not update.

Are there any special permissions required on the table?

many thanks