How To: Obtain a JSON string for use in the ConvertWebMapToMapDocument tool
Log in to ArcGIS.com. Open the applicable web map in the map viewer.
Run the Fiddler tool, and reset the option to capture traffic:
a. From the File menu, un-check Capture Traffic. b. Clear any existing lines by clicking Edit > Remove > All Sessions. c. Enable the option to Capture Traffic again.
In the map viewer, click the Print button.
In Fiddler, wait for the lines related to the Print operation to be displayed in the tool dialog, then disable traffic capture and click the Inspectors tab.
In the dialog window there are several lines of traffic shown. Look for the line with the following parameters: