Is there a way to get body from API webhook?

Need help APIs
1

Hello. I am working on an tool.
The Cloud Convert API I am using, sends webhooks with URL in HTTP body, instead of putting in API requests.
I did find Webhooks | CloudConvert API but I don’t know how to get from HTTP body.

2

Set an endpoint with parameter definition “detect request data”

3

when i am trying to create a cloud convert webhook only gets an error tht says invalid url