{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3449",
    "entityType": "User",
    "nonce": "0x7d8836f7300e28f2c25798a7b0c088ba8799d9a66238e0ecaf8c3eb91b8b8659",
    "signature": "0x85f0d4852751e7835269e6d8dc1e3c4aa1a36903582b4a368e70bc2c42b6e25f4946adfd01fd2cf8f48cecfd8e42f158c5b0734176a3feb6e1e9e0077c0ce83b1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}