{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "753584533",
    "entityType": "User",
    "nonce": "0xa36c49faaa355e17f7e12a9c1f1fbb64dfcd08da9bb6ebec28b450864f89d9c7",
    "signature": "0xa3f0e372e0621cd13eb5a452933ad2df468bda01ad77d703f5ddd5e29b838bf35a1e27eca821631a9fae3c3b776f007a6d833d7617b72b2b87c2aaedcbfd8f691b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}