{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x45e9825f0880c647c8b1ac2f29c7bab12914891b7b5918b7007d81449eafe899",
    "signature": "0xfa8e4f87cd0efb809311d4b6fdea926ecb5bded6c5935da6f4df36e5e737c7112caea411721c3269ff89658e0a932cc92d1e1ced66af91041e1fb00f291f9cb51b",
    "signer": "0xcDd4bA67dFa5A12799fdF828BAe6484f14Fb02Fc",
    "userId": "502753271"
  }
}