{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "211200",
    "entityType": "User",
    "nonce": "0x4206c9018a5768adb85c6f84f6bc47c850eedb6177e73ec6438d2c4ec529d304",
    "signature": "0x16fb57d10679fc659f7d266dfa8ed9e2b732addaf89b6f985aaaad09ef6a759a63f0d19a3616785a56624379bdc5f716f5813bacd6725208a5668e5aef7ec3211c",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}