How to get variables from ionic angular post?

From my backend server, i couldn't get data from $_post from ionic angular post.

Below is my code:

$scope.formData = {};

$scope.processForm = function(){


  $http({
    type: 'POST',
    url: 'http://domain/contact',
    dataType: 'jsonp',
    headers: {
     'Content-Type': "application/x-www-form-urlencoded"
   },
    data: {
      _method: 'POST',
      name: $scope.formData.name,
      email: $scope.formData.email,
      subject: $scope.formData.subject,
      message: $scope.formData.message
    } //pass data as string

  })
    .success(function(data){
         //callback
    });

};

variables: name, email, subject and email couldnt be passed to backend.