Unauthorized (error 401) Postman

I am trying to send Push Notifications (using Firebase platform) to my Android app through PostMan Chrome App, but I fail to make it work. I have followed all the instructions on c

Solution 1:

The key specified in the authorization header must be the Server key or Legacy Server key shown in the Firebase console tab for Project Settings > Cloud Messaging. The Web API key shown on the Project Settings > General tab will not work.

Also, the property for the notification text is body, not text:

{"to":"/topics/NEWS","data":{"extra_information":"This is some extra information"},"notification":{"title":"NEW NOTIFICATION!","body":"Click me to open an Activity!",// <= CHANGED"click_action":"SOMEACTIVITY"}}