Laravel Eloquent toArray not using square braces

I'm writing an api and attempting to convert a number of results into JSON. When the eloquent result is converted to an array, I am expecting something like this:

[
  {
     "id": "0", ...
  }, 
  {
     "id": "", ...
  }, 
]

but instead, Laravel displays it as a key, value list using the table key:

"0":{
       {
          "id": "0", ...
       }
    },
"1":{
       {
          "id": "1", ...
       }
    }

Here is the function:

$results = \App\Event::with('sandboxes')->get()->sortBy('start_time')->forPage($pageNum,$perPage);
    return response()->json(array(
        "events" => $page,
    ));

How can I get Laravel to give me a proper array?