{"images": ["/user/57/house-11-1.png", "/use/57/house-12-2.png"]}

$path = $this->processImage($request, $user->id, $house->id);
    /* uploads the image to the server and pass path of the image*/
    if ($path) {
        $jsonstring = $house->images;
        dd($jsonstring);
        $arr = json_decode($jsonstring);
        $arr['images'] = [$path];
        $json = json_encode($arr);
        dd($json);
        $house->images = $json;
        $house->save();
    }

class userHouse extends Model implements Changeable
{
    protected $casts = [
        'images' => 'array',
    ];
...
}

[2019-05-27 08:01:15] local.ERROR: Serialization of 'IlluminateHttpUploadedFile' is not allowed {"userId":57,"email":"info@test.com","exception":"[object] (Exception(code: 0): Serialization of 'Illuminate\Http\UploadedFile' is not allowed at /Users/dsfsdf/ah-website/user/laravel/framework/src/Illuminate/Session/Store.php:128)
[stacktrace]