{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xcf2f58de400e955b8de28243949897ff9cedbdbad8e324448450b780534649c9",
    "signature": "0xe57f5e1eac137786dbcafdafbb77b1518db109f0cae87366256ae8aa7258a9b377b46455db82367804ec5c37334faa66c872d7208accee80666f823c1918516b1b",
    "signer": "0x1d599f4FbF1061DC7b1130983cA14dAC7bbEc466",
    "userId": "999192071"
  }
}