Extrinsic 20599-1

{
  "heartbeat": {
    "blockNumber": 20598,
    "sessionIndex": 343,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc88e9b7a6ea60545469654eeca1e49c26bb065b31d4c913bc24fe533eea41a67b2cc0980a2b53b6732116a60a79072176e4325d5a4b9cc513282c97903285188"
}