I'm starting with the new Google service for the notifications, Firebase Cloud Messaging. I am able to send notifications from my Firebase User Console to my Android device for testing.
The problem I'm struggling with is that I can't send a complex structured data via Console > Compose Message. For example "prop3": {"inner": 42, "inner2": "test data", {"go": "deeper"}} becomes "prop3": "{\"inner\": 42, \"inner2\": \"test data\", {\"go\": \"deeper\"}}". I expect it to be a JSON tree with nested nodes, but what I get is a plain string.
Is there any way to send a notification with nested properties using the Firebase console?
I don't think you can do this on console. Hit FCM server with custom request.
You can refer this answer
https://stackoverflow.com/a/30778643/4620609