I want to change head tracking data of oculus in unity

Hello
I have a question about unity(5.6.0f3) and oculus(cv1)

I want to make a headtracking VR with some delay using oculus and unity

detailedly speaking
when I rotate my head with oculus in Unity VR,
the scene do not change immediately.
After few seconds, the scene follows the head rotation.

To make that, I have to save headtracking data few seconds and load it.
for the first step to make the delayed VR,
I want to change headtracking data from oculus in unity

I thought related code is...

I want to change head tracking data of oculus in unity