Currently in the alert action 'Send a GET or POST request to a webserver' sending data in JSON format is not supported. This need to be included in future versions as this will help in sending data to a third party system in real time.
This would be a great feature. I had to jump though hoops getting Orion to run a powershell script which just turned around and did the post.
I would make the format a dropdown box so you can expand it later. JSON, HTML, RAW, etc.
Have fields for timeout, retries, and an option to move immediately to the next escalation if it fails.