Extrinsic 6686-1

{
  "heartbeat": {
    "blockNumber": 6684,
    "sessionIndex": 111,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xa4a7004f6921137ad317930e20702f59348bcdbc337d2f17d175e5b0def74f29f08430079bdf4859e74e9caf8f306d941553dd06f96b3d1bda2711e937341e89"
}