Extrinsic 418661-1

{
  "heartbeat": {
    "blockNumber": 418660,
    "sessionIndex": 6977,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x920f2400d5a6818b972ea2fcd09ba5147bc32305b2fc784fc79edf31c714c47ad4944cdeb952bca509ebeab1b31fd21d08ad5a9842c9b91c8ad70d81e3e6888b"
}