Extrinsic 12685-1

{
  "heartbeat": {
    "blockNumber": 12683,
    "sessionIndex": 211,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xae7d36f0ba965a29cdd749fe501f46f12d97b58199537c146d333895fce28e684530a76e852de2fc8d5d8a61c973a3d8cac2ef4592bd2a081cb0d6c42aa60d85"
}