Extrinsic 34421-1

{
  "heartbeat": {
    "blockNumber": 34420,
    "sessionIndex": 573,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x6cd072c130f36f72efaf897c98c91f7bf1746fca67ebccbb1dfd159a2bb5da05244a49b5e808625aaa4e50e5afb22f5ee16fe4305451c86948a58218303bb18a"
}