Extrinsic 12882-1

{
  "heartbeat": {
    "blockNumber": 12880,
    "sessionIndex": 214,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x6667a36f4fc7a729d7d6f8a35f89a9b4e3ff685452fc7d8968842b152d8fb227106c4ffcb067a41be95cf044b5ecfdebc3b404849139d53b006e9f8cbdd99e84"
}