Extrinsic 177578-1

{
  "heartbeat": {
    "blockNumber": 177576,
    "sessionIndex": 2959,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x9e72673952d2ccf774413860cc6ab9e703661588685cb1e241a31c7cdea30e4c5dec4be4e3b17ebc3bcb598f1b2a3babd2da4a1d9124ed58e03c75c089e91f8b"
}