Extrinsic 19244-1

{
  "heartbeat": {
    "blockNumber": 19242,
    "sessionIndex": 320,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x08ab2cbc167d0eb2aec2d9c375494a50e9c7db4f347182ae8a3d13b9ab436c4df781016428831c046a54bfc392edc43d7e72610bb1d90047546c6ff746fe9588"
}