Circle CI api url to trigger a pipeline on a webhook

I am trying to add circle ci in a phraseApp webhook, so on every translation change, circle ci pipeline would trigger.

Since I need to give only a callback url in a webhook, I have given like below

I am currently have couple of issues

  1. How can I pass parameters, branch name in this? I have tried to pass branch as a query param, that didn’t work.

  2. I am getting 400 error response from circle ci when the trigged via webhook , not sure what exacly is invalid in the request (I have tested webhook via send test notification, which worked fine and pipeline got triggered)

Please help to resolve this issues.