Saves a WaitingListStudent's preferred LessonGroups
{ "Criteria": { "WaitingListStudentId": "00000000-0000-0000-0000-000000000000", "PreferredLessonGroups": [ { "Id": "00000000-0000-0000-0000-000000000000", "Priority": 0, "LessonGroup": null } ] }, "Context": { "DivisionId": "00000000-0000-0000-0000-000000000000", "Language": "string_example", "ShopId": "00000000-0000-0000-0000-000000000000", "SessionId": "00000000-0000-0000-0000-000000000000", "Origin": 0, "Password": "string_example", "Encode": false, "AccessToken": "string_example" } }
{ "Result": { "ValidationResult": { "IsValid": false, "Message": null, "brokenRuleName": null } } }