fcm_format.json

{
    "notification": {
        "body": "this is a body",
        "title": "this is a title",
        "android_channel_id": "green_channel"
    },
    "priority": "high",
    "data": {
        "click_action": "FLUTTER_NOTIFICATION_CLICK"
        
    },
    "to": "fcm token"
}