Preheat oven to 350°F. Spray a 13×9-inch baking dish with nonstick cooking spray. In a small saucepan, heat chicken broth. In a large bowl, combine beans, corn, and rice. Add hot chicken broth, 1 cup cheese, soup, sour cream, and salsa, stirring to combine. Stir in chicken. Pour mixture into prepared baking dish. Bake, uncovered, for 45 minutes.