Zoho Books Webhook in Custom Module doesn't work

Zoho Books Webhook in Custom Module doesn't work

I have a custom module "Purchase Request" in Zoho Books in which we're trying to convert status of the PRs to Draft and Pending Approval. We've explored different applications and custom functions but found that the status is not "writable". However, using webhooks we successfully executed a PR from draft to automatic "Approved" using a workflow rule and an associated webhook mentioned in the details below.

PUT

Headers:
Content-Type  application/json;charset=UTF-8

Authorization Type: Connections (zbooks2)
Body: JSON Payload (Raw)

{
  "status": "draft"
}


Unfortunately, the same webhook currently fails to execute with a response code of 400. It would greatly help if we can have the syntax for the correct URL (without specifying a module record id) used in the API Call and the RAW JSON Body code.