Extrinsic 19662-2

{
  "heartbeat": {
    "blockNumber": 19661,
    "sessionIndex": 327,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x369a957de2f1d3ce549747e24ede7a98857acce2e5f9e6270e361231f020500ab88281a8d2340e174b384a2821c1a2c9d9e60a6cdcacc7f85079f4d1a9f98185"
}