In laravel 10 / php 8.2 app I keep results of some request in database, json field.
When data read from db(mysql 8) on the page it looks like :

I save data in method as :

public static function write( string $key,  ?string $data = '' ): KeyData {
    $keyData->data = $data;
    ...
    $keyData->save();
    return $keyData;

}

In KeyData model data set in casts :

protected $casts = [ 'data' => 'array', ...

and in migration defined as :

$table->json('data')->nullable();

Checkin data in db I see a lot of slashing and “n” chars :

and when I read saved prior html data from db I see a lot of symbols on the page which I do not need:

I tried to clear saved data with trim, stripslashes methods – it partly helped, but not completely.

How correctly save and read html in mysql json field ?