Grafana webhook not working

I was tasked with sending alerts from grafana dashboard to a messaging app called flock. I have set up my webhook but when I try send a test notification, I receive an error “400 bad request”. When I use a webhook for rudderstack it is able to send a test notification as well as alerts. I would like to be able to send alerts straight from grafana to flock with an included attachment showing the panel associated with the alert.