In general a Safety Pilot is a person who can fly, but is there as a passenger and only becomes a pilot if forced to take control for safety reasons. On that basis, a safety pilot would not reasonably expect to log anything other than passenger time. Some administrations may differ but I expect most would not recognise time as a Safety Pilot as it is not defined in ICAO Annex 1 and is not included in ICAO Annex 1 Ch2 2.1.9 Crediting of flight time.