{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xd9548e5ae302243863563ba89c19ba1e2a9f18c70a76ca8a6aff800980e0b28e",
    "signature": "0xa574cec636e04b6a841a8f3e83cb67c41c135590e1ac022e27b51cfa9d92ac2743a46c1119dc2ac70ad01bbf2591167180990c67ae835b505d7b6b25cf36cc241c",
    "signer": "0x33c702d534707f8Cada5DdD521C5900827973f1D",
    "userId": "5642"
  }
}