Planet Man, targeted at kids, was produced by Palladium Radio Productions. It is: "... the fascinating story of Dantro, the planet man, trouble-shooter for the League of Planets Organization."
If you are wondering the League of Planets Organization is: "the law enforcement body for peace and justice in the celestial world." The headquarters is Planeria Rex "the capital of the planets".
So Planet Man (AKA Danto) is part of the popular 1950's space rangers genre. But he was not a human. He was in fact a humanoid which was handy for his dealings with Earth.
Other regular characters who appear in the show are: Dr. John Darrow and his daughter Pat, Jane and Billy and Slats his engineer.