Extrinsic 53921-1

{
  "heartbeat": {
    "blockNumber": 53920,
    "sessionIndex": 898,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x9cba93220c0e4f68b34b55cd3b96f81cfd99e9488771f754c971e7616c626f58e4dbd1e66220fc81a5a46f3e58a4bc715532e83a15fb8ce169f350b811f1b380"
}