id/int,pres_uri/string,pres_id/string,event/int,expires/int,desired_expires/int,flag/int,etag/string,tuple_id/string,watcher_uri/string,call_id/string,to_tag/string,from_tag/string,cseq/int,record_route/string,contact/string,remote_contact/string,version/int,extra_headers/string,
7
