Extrinsic 23257-1

{
  "heartbeat": {
    "blockNumber": 23255,
    "sessionIndex": 387,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x18db7eebd892e3ffa186c701a4c458860287cf94dba9c8eabf8486a628f07473f9ff2a6fbe6be5f79663ddf71171374688b91b34521cb305602c824a9f2c7d85"
}