JIRA Cloud - Slack alert when a new project is created

[Anuj B]

Hi - 

I'm using JIRA Cloud, and I have [x] project created event enabled in Slack webhook in the JIRA>System>WebHooks.

How do I now make it fire a slack alert whenever a new project is created? Thus far, all alerts seem to be at a project level, as opposed to a jira instance level.

Thanks!