POST - REST persistence

[Robomedia]

var Project = new Model('project', function(){ this.persistence(Model.REST, "api/projects"); });
var project = new Project({name:"testing12345"});
project.save();

It will send data like this : {project: {name: "testing12345"} }
yet my backend expect just attributes {name:"testing12345"} . Can this be configured in js-model, or do I have to change my API ?

thx