Extrinsic 2252-1

{
  "heartbeat": {
    "blockNumber": 2251,
    "sessionIndex": 37,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x608127f935a156113da49288335f0077cafbc014d1dd78ca638e8925aac7011c9170cfd5d3b9dd57e149f7ef6faae50319cc6907fa33438ec31a6ff3be7b9d88"
}