Retrieve Webhook Trigger Attachment Data

[RyanDickinson1]

I have setup a webhook receiver in Workflow Manager Enterprise 11.1 that is triggered from any edit made on a feature service. The webhook triggers the template and includes the attached responses. I also configured the output paths to include the edits. The problem I'm having is accessing the other attachment that contains the triggering item's information, in this case the feature service url, webhook name, changes url, etc. I see the data in the attachment from an email event, but don't know how to setup the output paths for the second attachment. Using $.serviceName returns empty.