{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "100403",
    "entityType": "User",
    "nonce": "0x1e81466144637e8de90946fb66a75bc8293ed261bb64c9b3defc53ed8170d675",
    "signature": "0xe854e68be2196997a1057c286bc449174ed2bf42529a373e8e2df39ab46cbb833fe9ef776b2422f7f2ee1ab66cb5a268ac4cf4bf65ea75cb54f8ad09ce1ff6b11c",
    "signer": "0x03B2B16FC491BB9F7E9819D5186aF26a4DB298cE",
    "userId": "813481002"
  }
}