Extrinsic 27375-1

{
  "heartbeat": {
    "blockNumber": 27373,
    "sessionIndex": 456,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x90f6dddaf30d37dd4dd842f2e9031ee9bc52c5e240f471c5f56c017868c754720c718d27ac25b08fc2acce9ca11472c78900647b1f29ae1fb645668349eefe8d"
}