Extrinsic 19004-1

{
  "heartbeat": {
    "blockNumber": 19003,
    "sessionIndex": 316,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x82afff34c9650a50878c8273211b61fb8ad2e1ecfe28aacf06246bb63f1b433d20e07e47f262d0b1348c31582c07d9c4b52e549fbb66196f5a683276ffc0b883"
}