oneSignal blocks help

i have looked through at every single post on this community and tried all of them can any body please helo i want to send out a push notification to a different user when i click a button please can someone just show the simplest way in blocks to do so i can send my tests out through the onesignal website so i know that works

Hello @biltongconnectionapp
To send a notification to a specific user you need to use a Web API. In these API settings, you have to add these headers.

Also, you need to use the body of the Web API for adding the details of the call. Please see the screenshot.