{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339826419",
    "entityType": "User",
    "nonce": "0x1295139885da2897bc8a31434410ff65c6348261ae3366f2612323fa1b1a38fb",
    "signature": "0xeb8f161b720c74631c7b8a85e2e44f06aca943ae7015ae21900b2844a1e7959017b6c34811f3c0f39a8909aedddafa4c20b3898f6fea984afd14507555f551681c",
    "signer": "0x21370B7a703524cC2941323C2c960224021F8D56",
    "userId": "986168993"
  }
}