URL Request Payload Debugging?

Is there a way to see the payload of a url request in the debugger view (Ctrl-Shift-I)?

I know it’s the standard chrome web tools view. And I know to go to the network tab to examine. But I don’t see any of the network traffic there. (Checked that I have no limiting filters.)

The problem I’m up against: I’m trying to implement oAuth2 authentication flow. And as far as I can tell I’ve implemented everything correctly, but I’m still getting a 401 error code. Which is telling me that what I think I’m constructing in the way of a request, and what I’m actually constructing are two different things, and I want to see what’s actually being requested.