Player rotation based on SpineBase Direction

Hello!

I'm working on a VR game with Oculus Rift DK2 and Kinect V2. Until now what I did is giving to my player the direction of the oculus' left eye anchor (like this: lEa.transform.forward) and that was the direction of my player. Now I need to change the direction of the player, only if the body is actually rotating (So if I just move my head but keep walking it won't change the direction), and I would like to use the normal to the SpineBase JointOrientation but I don't know how to interpreter the Windows.Kinect.Vector4 data and use it to give a Direction to my player.

Do you have a solution for this?

Thanks