{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc6ad1f3d39ac35f756f9eaf704c684f8c6a2ae2380a7c7018aa13f0c750b3dbc",
    "signature": "0xa2b811466c42b4ea2f6e3dbdfca33a83de4691671764d59d08d0049aab227e1144b23a60bddda0801b59d6a9296ef41c69e3d231e727ff7ff22ac95c810413471c",
    "signer": "0xF542Fc138B42A0Bc04bCfb495d962f3313239465",
    "userId": "728200922"
  }
}