Extrinsic 7304-1

{
  "heartbeat": {
    "blockNumber": 7303,
    "sessionIndex": 121,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xaac9b00f4663c5be566e5c6880f5c5b1f73731922f959518c2a7412344fcab5d627b88a5ea3d5a892062c2e90f0ff1cd549bee78da54c343cf83a6a280636588"
}