RE: Customize content of webhook payload
Hello Henrik,
Since you posted this in the 'CRM Online Development' forum I assume you are using Online.
In Online it isn't possible to change the content of the webhook, when on OnSite you can do this by creating a custom webhook plugin.
A varly new option is to use CRMScript to handle the webhook, see documentation here
When a webhook is send to an CRMScript it does contain the values that have changed. Maybe you could do your processing in an CRMScript? Or trigger your external system using the CRMScript?