{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2e706253ec04477548a01b1fa8879abafcb7bf219278e9ca3b21add0f7861924",
    "signature": "0xc304fc099f6c5c85b9fd439b8023fb2e96b0f04c6c9fa5f46c470b968e3ea5ec7e1697900395a9f7700c17ca564adec0cdcbf70dbce46f8acbca1130fb7f00ec1c",
    "signer": "0xA518e8a474DA56A9A8e87701e3E6894d7D184BdF",
    "userId": "899883571"
  }
}