Extrinsic 17555-1

{
  "heartbeat": {
    "blockNumber": 17554,
    "sessionIndex": 292,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x6248ea1fe09eb72c7d076af0f722f1105a7b6cc8352a3e9ec7afbc5d397d0d2e24891d11347974ebf5731bdd66c10712b8bd56c8a03fe6159ddcbd45591d108b"
}