{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "161720",
    "entityType": "User",
    "nonce": "0x13414c728d52e186d1fe83c10964d540dea050664489a6eda6b858bfec316ae0",
    "signature": "0xe802d9dc37b3907140e456144a905810a9140b03a12d7133f04a01843a364540280faf193cecbf7021a26202e150a37e630f193ed9d36af7af2b7751737838431c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}