Jason Sanjay, son of Tamil Nadu Chief Minister Joseph Vijay, recently made his directorial debut with the Sundeep Kishan-starrer Sigma. Despite the film receiving mixed reviews, Jason appears to have built a fan following for himself through his pre-release video interviews. While speculation is rife that he may soon make his debut as a lead actor, we hear that he has now signed his first brand endorsement.A source tells us, “A Chennai-based jewel- lery brand has pulled off a coup by signing Jason as its brand ambassador. The promotional campaign was shot in the city recently, and an official announcement about his association with the brand is expected on Saturday.”