Extrinsic 37120-1

{
  "heartbeat": {
    "blockNumber": 37119,
    "sessionIndex": 618,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xca7612e881001ac14c25a90b1e27345890e0f8cb7900b197803f80660be76703bda73a68a004c502b62329b638d346d3eee06244eb30bddf97c0568a6a51008b"
}