Webhook for Group or Role updates (user added / user removed from role or group)

Hello,

I am working with the Atlassian-connect for Jira.

I was wondering if there is any webhook to trigger and get information when

  1. A user is added or removed from a user group.
  2. A user is assigned a role or remove from a role.

Is there any other trigger that I could use instead?

Thanks,
Avinash