{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0x02b30da801b6c45711da67476aa6aaf3b07e0796191913abee503e7d368696d2",
    "signature": "0x3a949d73baf395654732b0f8a796bf7b91ab4a4d7c7963e5bdc4f2155e6db5817b8fd02781c303f2fc1cdd9c0bfb7c87d2bebabd5f4747e5d0ff1eae61ae5bf21b",
    "signer": "0xdd9866f5231155D8450f557CF6216590fAeE2900",
    "userId": "697765896"
  }
}