On your arcgis server installation, go to the place where your arcgis mobile content is published. By default, I think this is \inetpub\wwwroot\ArcGIS\Mobile\ItemsRoot\<map_id>.In the folder named <map_id> you should have a text file with the JSON content.Does this answer your question?
Paul Lohr
Lohr Geospatial Services, Inc.