<PackageReference Include="Newtonsoft.Json" Version="13.0.4" />

Newtonsoft.Json.JsonConverterAttribute

public sealed class JsonConverterAttribute : Attribute
Instructs the JsonSerializer to use the specified JsonConverter when serializing the member or class.
namespace Newtonsoft.Json { public sealed class JsonConverterAttribute : Attribute { public Type ConverterType { get; } public object[] ConverterParameters { get; } public JsonConverterAttribute(Type converterType); public JsonConverterAttribute(Type converterType, params object[] converterParameters); } }