Extrinsic 20498-1

{
  "heartbeat": {
    "blockNumber": 20497,
    "sessionIndex": 341,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x9e7bd6a054eb3b420bcfaab810fe476032c8cebd5aeeef0720f4da563ab7a049affb53df8310c5fd10f4605857fd1d53e3cb85b4df37fc1df666244a0eb0ae82"
}