how do I insert with Laravel Eloquent an associative array

I have this array

$data =  array (
  0 => 
    array (
      'first_id' => string '52763718329' 
      'second_id' => string '222122'
  ),
  1 => 
    array(
      'first_id' => string '527628573' (length=9)
      'second_id' => string '22210' (length=5)
   )
);

$model = new MyModel;
//$model->$data how do I pus data array?
$model->save();