{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345493",
    "entityType": "User",
    "nonce": "0xa802f6f7fd537552273ffa1362ff73f4043ce7ff9d782ef16e843ee15536bcc0",
    "signature": "0x489d9701edbfe833ed795d9c96f3fdbe755e660a3fe761bb08274525e7aff22516ed06368cd446eda10613dc6f08d7e1c53f5e4170baa613b3424663837ac2751b",
    "signer": "0xfEf199273dc1B7112aA0D32cc0DbF797aC6EAfE5",
    "userId": "198179849"
  }
}