Webhook authentication request signature

[CTaidiSantana]

Hello everyone,

I need some help with setting up webhook authentication via request signature, I have a workflow that once triggered needs to send a post request to a certain API that requires authentication via request signature.

After reading documentation on this topic I understand that I need to create a public APP and then connect it to my HS account, after this I can select that app id as auth signature generator.

Having this I also need to set a specific secret to generate the signature but I can't manage to find a way to do this and I'm not even sure that this is possible.

Is there a way to set a specific secret within a public app so the request signature is built with that secret?

Thanks beforehand!