[BUG] Sending notification with channel

[walnut-co]

Describe the bug
I am using the following template to send the push notification to android devices with Channel

{
  "message": {
    "notification": {
      "body": "message body",
      "title": "Hello",
      "channel_id": "channel_name"
    }
  }
}

Should this work ? I am getting payload invalid from the azure portal.

Exception or Stack Trace
I am getting payload invalid from the azure portal and using c# getting payload errors

To Reproduce
Send test using azure portal with the above payload

Code Snippet

{
  "message": {
    "notification": {
      "body": "message body",
      "title": "Hello",
      "channel_id": "channel_name"
    }
  }
}

Expected behavior
It should send the notification to the channel in Android

Screenshots
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Setup (please complete the following information):

• OS: [e.g. Windows 10]
• IDE : [e.g. Visual Studio 2019]
• Version of the Library used

Additional context
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Information Checklist
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