Extrinsic 3768-2

{
  "heartbeat": {
    "blockNumber": 3767,
    "sessionIndex": 62,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xc252506be81ddbbbf689774abac65539e58f3df21e19f8cc2b3fadf5ff9d223eaef6a24b07ac03f40af608befb545e5d1668fc2e424d98720a72cd6492d8138f"
}