There is about one gram of sodium in a tbsp of soy sauce. This is certainly sufficient to curdle any self-respecting bacterium.
It should be fine for a week or so.
Dieticians and health gurus will become apoplectic at my advice and tell you to discard the chicken quickly. They are misguided. They do not speak from experience or common sense.
If you grill it after a couple of days, it may be tough. Wrap some bacon around it. (Before you grill it.)
Jay
