Submit Form as JSON with Play Framework

I am trying to submit a form as a JSON object because I want to create a REST API with play.

The issue that I have is that Play tells me that is not a valid JSON.

My FORM code:

@(form : Form[Product]) @main("Create Form"){
@helper.form(routes.Products.createProduct, 'enctype -> "application/json"){
    @helper.inputText(form("name"))
    <button>Commit</button>
} }

Controller Code:

// Read JSON an tell if it has a name Path
@BodyParser.Of(BodyParser.TolerantJson.class)
public static Result createProduct() {
    JsonNode json = request().body().asJson();
    String name = json.findPath("name").textValue();
    if (name == null) {
        return badRequest("Not JSON");
    } else {
        return ok(name);
    }
}

Whats the best way to do this? a read about submitting with Ajax but because I am new with play I don´t figure it out the way to do this with Play´s form syntax.