{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "306521",
    "entityType": "User",
    "nonce": "0x1802eebcad291578195b9d32b7bacbd785ec1f4b50eead13d58d8c86c4e14b4d",
    "signature": "0x013506dcdbe3551ae6f493aed693dd81f5d7d72cb3ddf9d05906392b18cdcce86692e66d6b3a9c1298d28a74c37ab4b53e24747693850e3dbff0edde5dbc916b1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}