I need to send a js object to the server through ajax request;
is an object containing parameters for a sql query with Sequelize orm in node js; an example is like this:

var data =

{

    include: [

        { model: model.Shop },

        { model: model.Product,

            include: [

                { model: model.File }

            ]

        }

    ]

}

It can contain arrays of objects nested on multiple levels;
before sending it I can convert it to valid JSON if needed, like this:

var data =

{

    include: [

        { model: model.Shop },

        { model: model.Product,

            include: [

                { model: model.File }

            ]

        }

    ]

}

I've tried to send it as JSON:

$.ajax({

    //...

    data: data

});

The problem is that when in the node server I do JSON.parse of the received string, the value of each property is a string and it is not recognized as a model object;

How can I make my server able to understand this?