{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "558452493",
    "entityType": "User",
    "nonce": "0x7a6da252b860ac88559e54a715219b46da646999271dcf1118a73d22d20ff2a4",
    "signature": "0x353b2e32060b9d5b300edcecb9906d09df635c137c074714868455a5c4a35723121a8e607f5caf46df479c801fa34d9275c06acacc1d9a5290b8a724bdbb3b331c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}