The basic fields and their descriptions are listed here
To get the precise list of fields use:
1.The WCS_HOME/logs/flashphoner_manager.log log file.
This log displays all REST queries sent to the web server and all received answers.
2.The tcpdump utility to record traffic and the Wireshark app to view it.
This command records traffic that is sent to and received on the port 8081. Later, you can view results in Wireshark and see how the fields are sent exactly.