$scope.sendFile = function (newFile) {

        var body = newFile.body;

        newFile.body = "";

        $http({
            method: 'POST',
            url: '/fileReciever/put_file_for_obj',
            data: { objID: $('.objID__').val(), aFile: newFile,_body:body }
        });
    };

<configuration>
  <system.web.extensions>
    <scripting>
      <webServices>
        <jsonSerialization maxJsonLength="10000000"/>
      </webServices>
    </scripting>
  </system.web.extensions>
</configuration>