Extrinsic 40155-1

{
  "heartbeat": {
    "blockNumber": 40154,
    "sessionIndex": 669,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xe674249aa1e4ce5510b62142e36fbac09cf76cd00b53d4e598db66731e510b35c359df43fdbddeb41fd5ceb30592c2fbc520322949c12038968f19144f88458a"
}