The system automatically creates an Application User Entities record each time a user adds a service to an application. These records track who the users are for a given service in an application. Application User Entities Form 
Attachments Tab
The Attachments tab lists any files relevant to the Application User Entities record.
General Tab
Application (
...
Required)
The name of the application available to the user.
Entity (
...
Required)
The Entity field shows which service this user has installed.
User (
...
Required)
The name of the user with access to the service and application.
Rank (
...
Required)
The rank number indicates the order the Service appears under the Application heading in the user's profile.