Extrinsic 20068-1

{
  "heartbeat": {
    "blockNumber": 20067,
    "sessionIndex": 334,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x523b7e09dd840da1309a7e555b62b9278836e80f2737e35641c8a4c96533773060a01e1488b4de3313b38e7a249b30948148f85d265116e7c114681db66fbc8f"
}