Extrinsic 19830-1

{
  "heartbeat": {
    "blockNumber": 19828,
    "sessionIndex": 330,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x8ca88125439afe1e8507ac65a665c3eecf011f991fb4c40484b69302794f0e60b47d05aa6156f6768bfe147edbf8c5c614acc183947657130ec66cd11f8a9c87"
}