Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAABAwCIb+Sr5y9mdq2DLRCzfC4vZqe4CzkRZ7uas+lgPUcP/gE0Z4Bh5geRzgbh… (844 chars)"
  }
}