{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x123e4b8e5ae3bb31ea9384417d073050b1bb29c8488ebe173262d63e0ef6479c",
    "signature": "0xe8dcc98ad403195f1dd2c3af09d55f5f69eb6f439abb62c7d5053b249b7b800c160c9209d4513dbae9ddf466eca7e1ef31bf1401c99a2842da0abd75f31a43081c",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}