Extrinsic 4267-1

{
  "heartbeat": {
    "blockNumber": 4265,
    "sessionIndex": 71,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x243dc9276dfbc3650c5604fcc0bb16acadb03d6a30b243c7a15e35144a17343714d93e39b4ee88399e8a20d6b2e5456cd35d57db3f5fd88206312ce885ab8c82"
}