Analyze javascript http request algorythm

I'm looking for someone who can analyze algorithm that is used to generate requests for Google maps tiles, so I can simulate those requests myself. Page is here [login to view URL] This page send three different type of requests for map, satellite and hybrid images: map: [login to view URL]!1m4!1m3!1i3!2i5!3i3!2m3!1e0!2sm!3i284000000!3m9!2sru!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0 hybrid: [login to view URL]!1m4!1m3!1i3!2i5!3i3!2m3!1e0!2sm!3i284000000!3m9!2sru!3sUS!5e18!12m1!1e50!12m3!1e37!2m1!1ssmartmaps!4e0 satellite: [login to view URL] I need to know how to simulate those requests (including what is encoded in pb parameter and how to calculate number for token parameter)