Json.Net.JsonConverter for Unity Vector struct.

JsonHelper.cs

using UnityEngine;
using Newtonsoft.Json;
using System;


public class Vec4Conv : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        if (objectType == typeof(Vector4))
        {
            return true;
        }
        return false;
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        var t = serializer.Deserialize(reader);
        var iv = JsonConvert.DeserializeObject<Vector4>(t.ToString());
        return iv;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        Vector4 v = (Vector4)value;

        writer.WriteStartObject();
        writer.WritePropertyName("x");
        writer.WriteValue(v.x);
        writer.WritePropertyName("y");
        writer.WriteValue(v.y);
        writer.WritePropertyName("z");
        writer.WriteValue(v.z);
        writer.WritePropertyName("w");
        writer.WriteValue(v.w);
        writer.WriteEndObject();
    }
}

public class Vec3Conv : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        if (objectType == typeof(Vector3))
        {
            return true;
        }
        return false;
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        var t = serializer.Deserialize(reader);
        var iv = JsonConvert.DeserializeObject<Vector3>(t.ToString());
        return iv;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        Vector3 v = (Vector3)value;

        writer.WriteStartObject();
        writer.WritePropertyName("x");
        writer.WriteValue(v.x);
        writer.WritePropertyName("y");
        writer.WriteValue(v.y);
        writer.WritePropertyName("z");
        writer.WriteValue(v.z);
        writer.WriteEndObject();
    }
}

public class Vec2Conv : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        if (objectType == typeof(Vector2))
        {
            return true;
        }
        return false;
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        var t = serializer.Deserialize(reader);
        var iv = JsonConvert.DeserializeObject<Vector2>(t.ToString());
        return iv;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        Vector2 v = (Vector2)value;

        writer.WriteStartObject();
        writer.WritePropertyName("x");
        writer.WriteValue(v.x);
        writer.WritePropertyName("y");
        writer.WriteValue(v.y);
        writer.WriteEndObject();
    }
}

Can this architecture or working method function with "PreserveReferencesHandling.All," which means I can choose to store the element once and have subsequent occurrences of the same instance be referenced using indexes in the JSON?

Thanks :)