Extrinsic 55292-1

{
  "heartbeat": {
    "blockNumber": 55291,
    "sessionIndex": 921,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb67cda8024b4e3bf38612699ac108d4d2631467e4d9d47374d8ee11a14c1b60f9f75db75c4c03f34b4cff2078e827140d9a93b955f1e6678135dc79f58f40184"
}