{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "108701",
    "entityType": "User",
    "nonce": "0x1ab3f8e7c56a2a0e8b4c8d31b065857c8d4cdcc825ca40a6e29e98ffc450c75b",
    "signature": "0xfe69fa0d5b91696426a15d946a0c1a5bb8c308d9f68cd1b477337cfe962f2f1e28e9d69f995d9a8bc8ee704de248b255781af9c0aaa7cdb2653ba59d8c0bce821b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}