Error 404 when using Sky Ecommerce API

I'm trying to make a request via API to make sales via credit card.

Manual URL: link

JSON informed by SKY

{
   "MerchantOrderId":"2014111703",
   "Customer":{
      "Name":"Comprador crédito simples"
   },
   "Payment":{
     "Type":"CreditCard",
     "Amount":15700,
     "Installments":1,
     "SoftDescriptor":"123456789ABCD",
     "CreditCard":{
         "CardNumber":"1234123412341231",
         "Holder":"Teste Holder",
         "ExpirationDate":"12/2030",
         "SecurityCode":"123",
         "Brand":"Visa"
     }
   }
}

AJAX method I developed

$.ajax({
           url: "https://api.cieloecommerce.cielo.com.br/1/sales/",
           headers:{
             "Content-Type": "application/x-www-form-urlencoded",
             "MerchantId": "INFORMADO PELA CIELO",
           },
           data: {
             "MerchantKey": "INFORMADO PELA CIELO",
             "MerchantOrderId": idCarrinho,
             "Customer":{
                "Name": nomeCliente
             },
             "Payment":{
               "Type": "CreditCard",
               "Amount": valor,
               "Installments": 1,
               "SoftDescriptor":"NOME EMPRESA",
               "CreditCard":{
                   "CardNumber": apenasNumeros(numero),
                   "Holder": nome,
                   "ExpirationDate": data,
                   "SecurityCode": cvv,
                   "Brand": bandeira
               }
             }
           },
           type: "POST",
           success: function(data)
           {
             console.log(data);
           },
           error: function(x)
           {
              Materialize.toast("Ocorreu um erro!", 4000);
           }
});

When I use this method of error 404, I called the media and the url is correct and that's the only thing they say.

Has anyone ever had it and knows how to give me a light?