A 49-year-old man was stabbed to death at the Danforth Avenue light rail station in Jersey City late Friday night, Hudson County Prosecutor Esther Suarez said. Kenneth Brown, of Jersey City, was stabbed in the upper body just after 11:30 p.m. and was taken to the Jersey City Medical Center, where he was pronounced dead at 12:34 a.m. Saturday, the prosecutor said. Police who responded found Brown on the station platform at 11:37 a.m. The cause and manner of death are pending the findings of the state Regional Medical Examiner’s Office. The Hudson County Prosecutor’s Office Homicide Unit and the…