Extrinsic 54820-1

{
  "heartbeat": {
    "blockNumber": 54819,
    "sessionIndex": 913,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xa21e2b8759b4b5e3959076a6db4e2e714e411d2bbdb54c278947f2b2779bc21441d9987ae95528687ebb373f3c61e51b1e170d86aa8ad7d1f45699242822ea8d"
}