Saving classes with properties of type PhysicalAddress does not work. The reason should be the serialization:

    [Test]
    public void JsvStringSerializerWorksForPhysicalAddress()
    {
        var address = PhysicalAddress.Parse("0123456789AB");

        var serializer = new JsvStringSerializer();
        var result = serializer.SerializeToString(address);
        StringAssert.Contains("0123456789AB", result);
    }