NHL star Brad Richards signed his nine-year, $60 million contract with the New York Rangers in plain view of other guests at Cablevision honcho and team owner Jim Dolan‘s Oyster Bay, LI, estateat an Indepedence Day party last week. Rangers general manager Glen Sather pulled Richards aside at the barbecue to sign the papers. Teammate Sean Avery was standing nearby at the surprisingly low-key and impromptu moment. “He just sat down and signed on the dotted line on a table outside,” a spy said. Later in the evening, fireworks rocketed over the beachfront property.