How can I bind complex object to a field in Kendo Scheduler

I would like to add share functionality to Kendo Scheduler and in order to do this I would like the share field to be a complex object not just a simple strin for example.

So what I want to do is the following:

    schema: {
        model: {
            id: "taskId",
            fields: {
                taskId: { from: "Id", type: "number" },
                title: { from: "Title", defaultValue: "No title", validation: { required: true }                                },
                start: { type: "date", from: "StartsOn" },
                end: { type: "date", from: "EndsOn" },


                Share:[
                    {
                        user: { from: "users", defaultValue: 1 }, //users is a resource
                        right: { from: "rights", defaultValue: 1 },
                    }],
            }
        }

can anybody help me?