Message Action Entities are sub-type records that define the service where the action will be available. See See About the Message Actions Form for for more details. Message Action Entities Form
General Tab
Entity ID (
...
Required)
Defines the service where the message action can be execute from.
Auto Add
When selected the message action is automatically added to the Actions tab of any Aptify Message Form or Message Temeplate Template record for the specified entity.