Extrinsic 23253-1

{
  "heartbeat": {
    "blockNumber": 23252,
    "sessionIndex": 387,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xb83a07d4711b97d6eb5296ea4c1974e58be10e83bcca9d5be0721d857c08ff3c36b484862ea4b7d23d51e827be5261de2e14c03608b0d67cc569bb6d4ab56c86"
}