{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512820",
    "entityType": "User",
    "nonce": "0x306aa25b4a71e8ae714b2dd346220a61a73908fbea7439b7a5c36f773a7da266",
    "signature": "0x4891dff41fd25588ae3983ede4c7b55924b17e6555701253044c1b3dc6057e1449742441cc0fe2f3fa198b855a4aea4b7072d4284541b278833413e14af602eb1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}