Extrinsic 174277-1

{
  "heartbeat": {
    "blockNumber": 174275,
    "sessionIndex": 2904,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x662a5c7ba284581b1e740325094ed76b1d1c0b13a6fdf9a8e0a2cd58918c84311d68a294235b43e701bd59c3b7d0d3de8eb2e6960c6faba2154937bb5f969e8d"
}