Receive whatsapp messages by Webhook

Hello,
I have a WhatsApp business account. I set up the API from the meta page and I can send messages.
The problem is that to receive WhatsApp messages I have to subscribe to a Webhook.
I tried to do this integration with the Integration Service Webhook but it doesn’t seem to be understood.

From what I was able to investigate, Whatsapp expects the token sent in the call as a response. but Integration Service doesn’t.
Someone had the same problem. Do you know how to solve it?

I attach some reference links

META: Webhooks from Meta - Documentation - Meta for Developers
webhook: Integration Service: uso del conector de Webhook

Thank you so much