Extrinsic 174218-1

{
  "heartbeat": {
    "blockNumber": 174217,
    "sessionIndex": 2903,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x3a1213e2c22e348a3c1fa40d1c8670ed53c5a7be9c046295fb349105e22ac804d9ba1466b87c48b990e77a857d095bb25b394eb472d0a73166734d468e086a8c"
}