{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x15214085fb46e35d219975d92f23155e29acbfd92acfa8616ea33d02f0cc6da9",
    "signature": "0xf2a905a734f1d3d51cc11cec852f181863a219e571d4fa492e583a9bb4b81bba33e7b9baef532b729e192f054125f4def3505656f6830a880d6fc078516e62001c",
    "signer": "0xE56F072937DD0D77b45b55A5e4c0915d838f879c",
    "userId": "225602763"
  }
}