The string you mentioned refers to the digital file for the DLC, specifically a version released by the "scene" group SKIDROW .

: Battles take place in three themed arenas: Adventure Bay , The Jungle , and Jake’s Snowboarding Resort . PAW.Patrol.Grand.Prix.Pup.Treat.Arena-SKIDROW.t...

This DLC adds a competitive battle mode to the base kart racing game, allowing players to move beyond standard races and into arena-style combat. The Story of "Pup Treat Arena" The string you mentioned refers to the digital