Extrinsic 6373-1

{
  "heartbeat": {
    "blockNumber": 6371,
    "sessionIndex": 106,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x425c61f49a96ce4f3215175aa70c9f3aba6a16819b1b5aeef9031ed1ac966809276abb9c6fd6b3021517873f33b74fe89c058fbb177e0e3be5f1ce822cd90784"
}