{
  "manageEntity": {
    "action": "Save",
    "entityId": "2040458820",
    "entityType": "Track",
    "nonce": "0x8e1e3b846850fe82e214ea4ec1da1c82a3908a2f28b0f156757322e30ff21044",
    "signature": "0x353bce1a8c2dc319ada30cc48462a0ca2f3d6c44ad71c570e733077ee95e7bff2febea45df35b7a5c100f1f7e1e030da2ce873af8abfb4d2740ed5f711b9ee951b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}