37405004 is a few hex codes put together that decode to 7@P and some unknown character at the end. Each furni in Coke has its own unique idea containing the @ character. I do believe the buy sharktale filter worked by replacing the @ id of the furniture you buy with the @ id of a piece of sharktale furniture.
This is how the sharktale filter worked. Each furniture has it's own catalouge id. Finding the values of catalouge items is quite easy, just record the packets of you pressing buy, and then cancel. And then on the recv packet at the very bottom it should say catalougeid or something like that (it's the last string). @A or something. I beleive that the sharktale filter is still possible, but the difficult part would be finding the catalogueids of them since you can't buy them in the catalogue...