Extrinsic 30760-1

{
  "heartbeat": {
    "blockNumber": 30759,
    "sessionIndex": 512,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x7e3c5975813f635127290c193095598e8efbfd4c66f70d6f5ce22b439664061e0951b4909c1fa450386c87796b6985f315093422be2d637c595942abf331c888"
}