[ Google+ ] How to find POST data.

Hi guys, sorry my English is bad ( I am from Russia)
I have a one problem:
In Google + (Plus) has a community (community), it is necessary to start the software.
The issue is that I can not understand where are the POST data, they are not present in the POST form and not in downloadable files (JS, or other SWF files.) There is a suspicion that they are formed with the help of Java Script. I made a breakpoint at the XHR request to the content links:

[url=http://rgho.st/6RVRLFrbH.view][img]http://rgho.st/6RVRLFrbH/thumb.png[/img][/url]

The call stack here is such a code in which there is little that I know:

[url=http://rgho.st/89WHxYZNx.view][img]http://rgho.st/89WHxYZNx/thumb.png[/img][/url]

Here such here POST data:

[url=http://rgho.st/82v76p7gF.view][img]http://rgho.st/82v76p7gF/thumb.png[/img][/url]

I want to join a group in Google + with a program (Python code), But I do not know how to get the POST data

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