{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "753516656",
    "entityType": "User",
    "nonce": "0x6e03030031f4531784c0f8797d8e5b9eebe3180b7413d6b15f138364f33bb910",
    "signature": "0x3a07579c49ba94ec08d842bddca8d646aaf957795a42628d92af03639a5726fe6570a92d01e6457efe15f526f16231005bfc5128effad9580c4427efcd07373c1b",
    "signer": "0xa6030211678990225Ac0a6a2862549d825e7A039",
    "userId": "543439291"
  }
}