Playing the push notification sound file

First we should add the Sound files  to  bundle of the projects.Then we can create payload like this.

{"aps": {"alert": "hi", "sound": "attention.wav"}, "device_tokens": ["1E22FB4E50812D90F85EA9B6E93DB7A90643F09D07A86B0E4FB724CE04735C70"]}

Sound field file name should exist in application's bundle.