Extrinsic 172419-1

{
  "heartbeat": {
    "blockNumber": 172417,
    "sessionIndex": 2873,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x3007105e2205e0f518c1d7cecfa846c0d463417b5425452d6ae3b868ddaf4d281579d088f16b61761216e1b6bca6b74d38165a075adc6b5caaf66e0ebfbddb84"
}