Android - sending data from acra to a php script

Question

I've been using acra in some of my apps and sending the data to Google Docs spread sheets, but I would like to switch to sending data to a mysql setup I have running on a server where I feel the data would be more secure. I can see how to send the data using the post method but I can't tell the naming conventions of the data so I can catch them with a php script.

Does anybody know what the variable names are or where I can look at them so I know what to look for in my php?