Extrinsic 34643-2

{
  "heartbeat": {
    "blockNumber": 34642,
    "sessionIndex": 577,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x64c778f2fa427297c8a6b9a369019eaa516f9a3c125017bcd024864042ae897a03430e4fb029cd09f61ba492d868379c1933465c1525986fc4abd4d453517983"
}