POst DATA appplication facebook

Bonjour, je voulais savoir si quelqu'un pouvais m expliquer comment décrypté un post data d une application facebook comme celle la s il vous plait

fb%5Fsig%5Fsession%5Fkey=2%2E8YUxdMvkVT6wAQaopajfLQ%5F%5F%2E3600%2E1246064400%2D1281514940&session=d2b3961816f53489d63395671c7e35&fb%5Fsig%5Ftime=1246059075%2E99981&fb%5Fsig=9050716f76d28af477522a10989b6e79&fb%5Fsig%5Fprofile%5Fupdate%5Ftime=1245536430&mj%5Fsig=2de938fa337907e51fdb3420b298f87e&fb%5Fsig%5Fuser=1281514940&fb%5Fsig%5Fapi%5Fkey=ca4ba4bc8c9905836c5d7f416760b0b2&fb%5Fsig%5Fapp%5Fid=5706713477&fb%5Fsig%5Fexpires=1246064400&fb%5Fsig%5Flocale=fr%5FFR&fb%5Fsig%5Fadded=1&mj%5Fsig%5Ftodo=1&fb%5Fsig%5Fin%5Fnew%5Ffacebook=1&gameKey=S1RQ3JCSEWW52VKT&fb%5Fsig%5Fss=7e1RJ%5FB08r8LQ3j2pdvOag%5F%5F&mj%5Fsig%5Fpid=15571409&fb%5Fsig%5Fin%5Fiframe=1&fb%5Fsig%5Fext%5Fperms=auto%5Fpublish%5Frecent%5Factivity