title: How to play notification sound using onesignal notification via REST API?
body: <p>I have tried a lot of things on like created channel mode, added sound in res/raw directory it works well with when we send notification directly from onesignal dashboard but I'm not able to figure out how can I send it through API. I refered onesignals official documentation and see something android_channel_id and also set it in API <a href="https://i.stack.imgur.com/wJHjZ.png" rel="nofollow noreferrer">API Image</a></p>
  <p>Please help me if anyone knows how to enable sound via API by the way the notification is working well but can't able to play sound.</p>