Extrinsic 19714-1

{
  "heartbeat": {
    "blockNumber": 19713,
    "sessionIndex": 328,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb26571bf2e9462957e1b768a3cf50786d770b7b3a7bd5b2789b35fd1adb11b35f9a5f7728cf27aae79fd288ad44186d2e5d42fb1cb669cbe0fa7a6e4af058584"
}