Extrinsic 7547-1

{
  "heartbeat": {
    "blockNumber": 7546,
    "sessionIndex": 125,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x98b535b630cda0b50b1c90f1aa8eb5bc324d902ba4396c0b2980eca836235a4f1da94ceb263b681f25005cce7e011123a1c7eb5b27fa1fc46666fde1cc4d6784"
}