{
  "manageEntity": {
    "action": "Save",
    "entityId": "456339",
    "entityType": "Track",
    "nonce": "0xebd3aef761114af06e41eed7bb6396caff84ccec086d43fcdc9f6f46006965c0",
    "signature": "0xc2225a23ea47318ec5c1722485f82098badbd6d4fd7471b4a6666e889009eec42dcd50581e433fb2bed94c14e8486fdc00b4a6ae32ecad9d5aa42917f1ffd75f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}