How to use filter for web service BasicDataService/GetObjectData

I try to find one folder with specific designation by web service.

I try to use BasicDataService/GetObjectData/{DATABASE} with this json body

{

    "StartObjectId": "00000000-0000-0000-0000-000003128F43",

    "SearchMode": 1,

    "ExtendedSearchMode": 0,

    "UseWorksheet": false,

    "OutputDesignation": true,

    "OutputLockStructure": true,

    "OutputProtected": false,

    "FullNameLoadMode": 0,

    "OutputTimestamp": false,

    "OutputAllAttributes": 0,

    "OutputObjectIdList": null,

    "AttributeFilterList": [{

            "FilterExpressions": [{

                    "FilterExpressions": [{

                            "FilterExpressions": [{

                                    "CompareOperator": 0,

                                    "AttriubteId": 5,

                                    "Value": "CodeBook - awaiting processing"

                                }

                            ],

                            "Operator": 0

                        }

                    ],

                    "Operator": 0

                }

            ]

        }

    ],

    "OutputAttributeList": [{

            "AttributeId": 5,

            "TargetUnit": null

        }

    ],

    "OutputObjectKindList": [{

            "CoverId": 111

        }

    ],

    "OutputAssocList": null,

    "TranslateSetting": null,

    "UnitSystemSetting": null

}

All folders are returned, the filter on attribute designation not work.
Where is my mistakes ?

For information, I use the lib Aucotec.EngineeringBase.Server.Service, I build an object ObjectDataRequest and serialize by

Dim jBodyContent As String = JsonConvert.SerializeObject(body) ', Formatting.Indented

Using bodyContent = New StringContent(jBodyContent, Encoding.UTF8, "application/json")

I try to serialize on xml but I receive an error about the OutputObjectIdList use an interface (IList).