Extrinsic 173491-1

{
  "heartbeat": {
    "blockNumber": 173490,
    "sessionIndex": 2891,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x6058550e0a01f28250c69009c55aa81bef27e2509305eee3db7ac178e774dd6743e81222ba81294de7f2d210d8c6b6da0cc1c90c0a402cdbf68022982d8a8088"
}