Using OAuth 2.0 with Service Bus

 I would like to use OAuth2 with my relay service.

 Post to get the token:
https://mynamespace.accesscontrol.windows.net/v2/OAuth2-13

with success

{
  "token_type": "http://schemas.xmlsoap.org/ws/2009/11/swt-token-profile-1.0", 
   "access_token": "net.windows.servicebus.action=Listen......", 
   "expires_in": "10800", 
   "scope": "http://{mynamespace}.servicebus.windows.net/"
}
 

This header does not work still

Authorization: Bearer "net.windows.servicebus.action=Listen..."

I have
"Invalid authorization header: The request is missing WRAP authorization credentials"

 I would like to use OAuth2 not OAuth WRAP