VK_API: Question about the users.get method. Why is it returning an error?

Question

JavaScript

When passing parameters, the method returns an error.

Error code 4.
Invalid signature.
Check the correctness of the request signature formation: https://vk.com/dev/api_nohttps

Without parameters, the code returns id, first_name, last_name.

VK.init(function() {
    VK.api("users.get", "{user_ids : '1'}", function(data) {
      id = data['response']['0']['id'];
      first_name = data['response']['0']['first_name'];
      last_name = data['response']['0']['last_name'];
      alert(id);
    });	
  }, function() {
    alert('Ошибка при инициализации VK.API');
  }, '5.8');

Answer 1

VK.api("users.get", {user_ids:"1"}, function(data) { 
   alert(data.response.id);
});

Answer 2

VK.api("users.get", {user_ids : 1} //... кавычки уберите