How to push a message by cURL

[hiroto78]

After getting access_token and InstanceId from SDK, tried to push a message by using cURL like below. This curl command is based on this site. The OS of target devise is Android.
https://firebase.google.com/docs/cloud-messaging/send-message

version:

implementation "com.google.firebase:firebase-messaging:17.3.0"

curl -X POST -H "Authorization: Bearer ya29.c.E...PCfhEE0" -H "Content-Type: application/json" -d '{
"message":{
  "notification": {
    "title": "FCM Message",
    "body": "This is an FCM Message",
  },
  "token": "fUSIYiaK1wQ:APA9....g"
  }
}' https://fcm.googleapis.com/v1/projects/{MY_PROJECT_ID}/messages:send

response:

{
  "error": {
    "code": 400,
    "message": "Request contains an invalid argument.",
    "status": "INVALID_ARGUMENT"
  }
}

Does anyone understand which part is INVALID_ARGUMENT or know how to get more error resopnse or message?

[hiroto78]

I mistook MY_PROJECT_ID for Public-facing name . MY_PROJECT_ID doesn't always start from project-***.