{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512214950",
    "entityType": "User",
    "nonce": "0xdb496b3ec5fc699a45dfcfb1022670e62f32f5cb746a09c92ebeb49dc8b06ea7",
    "signature": "0x4c67a8a31f1c7cd8d2e999d0aa5e551ec94e39fef45f953d7165696311407c9836ae3598b0f46b7509252ef97d5dd6a2ff6c4a990073d0b5021bb977727313151c",
    "signer": "0x9837C03EAdfA74365Cdf4e01e6840D356104bFab",
    "userId": "911622928"
  }
}