This title will be translated and it can contain variables from four loaded record, that will be replaced in the title, once a record is loaded.
We used a @prefix in the past, that is deprecated.
This will result in: Order 1 John Doe
if no '{' character is found in the title, brixxbox will add an {id} to your title to display the loaded record id.
If no app title is specified, the app id will be displayed for your app.