Extrinsic 51503-1

{
  "heartbeat": {
    "blockNumber": 51502,
    "sessionIndex": 858,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x7849e1c4450058bdc4c854bef7a5a57a3f19b5697b2c53b70c99fe1c008bab62f070ab64f6c4c71827a4d3eeca22d37a854a124a7cef4e3946625d6296c2628c"
}