Maybe try looking into "Super SU" that is what i use with my Moto phone.
A quick Google search showed people rooting it. (the S7)
BUT !
I don't know if your counter will be changed (not sure what that even means)
I think i get it though..
My Motorola phone has a setting in the Bootloader screen that changes once you root etc.
And even if you put stock firmware back on it won't reset the counter on mine.
I know some people need to be careful because of things like Android Pay.
Screwing with some phones can disable the ability to use some payment providers online.
Also Super Su has a newer mod released i have been using that is a revolutionary new way to root.
Chainfire calls it "systemless"
Google that to read up on it
This is what i meant basically..
http://forum.xda-developers.com/apps/supersu/2014-09-02-supersu-v2-05-t2868133Good luck & be careful