Extrinsic 8073-1

{
  "heartbeat": {
    "blockNumber": 8071,
    "sessionIndex": 134,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x80ace4140ef1be5a5d26b481da024fd641f3cecb806e9b74dce2d535f45da734e67a7ce6208d698d757e79fb58bb2122079fb8f32ecaff20bbd7729ecff30d88"
}