{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa150f5906995fb59f274066b14c4dce922c55127d21adcbecce43c0f3c529664",
    "signature": "0xf4f98d4d2835a4bbcc074c96d5cafee243a806ceb8331159b2de17dc8900d71467e5df893b6b79010e624a6faebeaacafd34c9efd66e493757c7099d427d17001b",
    "signer": "0x50e1a8C615070C462e1CA5cDAAc2fCaDa8376334",
    "userId": "263223449"
  }
}