Hello, I am trying to subscribe users to a Klaviyo list by sending data to the API via webhook. I think the issue is in the payload, but I’m not sure exactly what it should look like.

I’m fairly confident I have the endpoint right, and I have set this up with other email marketing platforms so I know the source of the webhook works. I’m hoping someone can show me an example or a template of what my payload should look like - it just needs to send first name and email address to the list.