Extrinsic 174322-1

{
  "heartbeat": {
    "blockNumber": 174321,
    "sessionIndex": 2905,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x8073d9114ae3a452b7f6f28efab1b0010da9df09aa9558730b71c4bcd02c51069cf3a0795074a662968f0f74238c2b06ca7b14c4bbd9413954eb227d3b636c87"
}