First verify that the frame is straight. If the rear triangle is bent to the right, that might be enough to cause contact. The classic test is to run a string from one dropout around the head tube and back to the other dropout, then check the distance of each run of string from the seat tube.
So how does a track frame get bent in that direction? Easy--most falls are on the right side, and once down the next guy rides right over the back of the faller's frame with the fallen rider's right leg trapped beneath.
If bent, as it's steel, it's no big deal to have it realigned.
If it's straight, then dimple it as gently as you can. I've used the ball side of a ball peen hammer as the drift. (hold the hammer in place and tap with another hammer) Don't just whack it in one spot--move up and down the chainstay so your dimple doesn't become a crimp.