Extrinsic 20432-1

{
  "heartbeat": {
    "blockNumber": 20430,
    "sessionIndex": 340,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x3cbe9a47c5a14814595185c98bc855d3e90c650566ecccdd45c9b462084ce14ed6a9a162cc4786e537bfd79cd2776150401719b8f738f1fcc4635f9e78ea6c88"
}