Receive in response a JSON from a webhook of another scenario


I have a scenario that allows me to send back a boolean thanks to a webhook.
On the other side I have another scenario which must receive this answer.

The problem is that when I test my webhook from Postman I have no problem to get the Json in the body.
But from my other Make scenario I get binary back into my body.

Do you have any idea about a step I would have built wrong?

Thanks a lot.