{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1721",
    "entityType": "User",
    "nonce": "0xdf63cc218bb1465c544c3d2ad177a11b63d321d2ac5f5f1c0164978a89304872",
    "signature": "0xf4ce6accfca1ca7b694aee5c7068bd2c4f6a78fa9ae2380f34268f72ee691e533053b0837468df722838406cc09e135b62cd833e30159d217620f579baee39081c",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}