Help using Slack for notifications

[troothdotcom]

I am running jellyfin 10.10.3 through docker on the latest Ubuntu Server OS. I want to use Slack to get notification when a session starts or stops. I got a webhook from Slack but I have no idea what the template should look like for Slack. I just want to be able to get notifications from sessions starting and stopping from any user. If anyone can point me in the right direction I'd greatly appreciate it.