{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3984",
    "entityType": "User",
    "nonce": "0x81aeda0ed19e0f6d03e7b5c9fb9d5adefd16a03ce914bc1e6aa201443eed0293",
    "signature": "0x400045fd00c271391ba6c94bb4bef06ee44592d454fcf92726229c9183661b6c6dc80f282d79ff77947f252757393b0f2f128329c6bf981eb985ce6d54598d451b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}