Extrinsic 174191-1

{
  "heartbeat": {
    "blockNumber": 174189,
    "sessionIndex": 2903,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xa42e833af46ceb0a8a6b10b4b224228b9919eed4b44bb88a4ea8a94153d97175ed360eb2d5fd1cecfacaa952cabe3f6fc15c5f54a165b5e83e52fe6139577d88"
}