Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwHyLF/polhjtuUOA2irYIrJU1GDu+pDGJ35U0mUVjI0Jx6fIc6bM4W0BZrA… (844 chars)"
  }
}