{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "325624",
    "entityType": "User",
    "nonce": "0x471beebd7af0ec7d9ee0d821ce43e824b7343d49ccc902acf8fe48a318270329",
    "signature": "0x2869e8a7909f5586ee6e84828c23943ffb87dd99ec2736a54c5b30d3d542c6ac4174f780be0eff23855f297b5460205f9ebe05daf9f21a2e64bd094d750257e21b",
    "signer": "0xA656a2329Dc742F06e5FA85bc5c9dEC6677D646B",
    "userId": "504172897"
  }
}