Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAABAwGWqHXkcIBcgkl2DQ+XTvB0vdAUkj/9dSNcT7Cg8yL4HzGOK6f253zpmV5X… (844 chars)"
  }
}