program output
---------------
Got a Signal!
Signal's Args : [:1.240] [] [:1.240]
Got a Signal!
Signal's Args : [:1.240] [] [:1.240]
Got a Signal!
Signal's Args : [:1.240] [:1.240] []
Got a Signal!
Signal's Args : [:1.240] [:1.240] []



dbus-monitor will output this...
------------------------------------
signal sender=org.freedesktop.DBus -> dest=(null destination) path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged
   string ":1.243"
   string ""
   string ":1.243"
signal sender=org.freedesktop.DBus -> dest=(null destination) path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged
   string ":1.243"
   string ":1.243"
   string "