{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "607333445",
    "entityType": "User",
    "nonce": "0x9b9f0d0cc5b22a7841ce2e763add700bd67467fb2b222032c1fa89c3c034d826",
    "signature": "0x8e718099eb1a873791f1aa5fafec24f70fba711cfdcbfe4ce663a3eeb4a0a1a31979e312684354f93b3ebda83ce7af7f815eb2d0f8a66335128d5b2b79294bf31b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}