My BAD - Problem solved!
I have by mistake been looking at the id_token and not the access_token.
A bit og background:
The access_token was until i provided the updated audience not a JWT but an Opaque token.
Hence to get a JWT, I accessed the id_token as this is a JWT. But forgot to look back at the access_token when I added the correct audience.
@dan.woda Thanks for your input and patience with me, the auth0 newbie 
Here is link til my github with the above example: