Parse Json content in model in Laravel

I have a payment and Payment history models

Payment History:

class PaymentHistory extends Model
{
    public function subscription()
    {
        return $this->hasOne('App\Models\Payment', 'id','payment_id');
    }

}

Payment :

class Payment extends Model
    {
        public function PaymentHistory(){
        return $this->belongsTo('App\Models\PaymentHistory ','id','payment_id');
    }
    
    }

I have a json column named as response in Payment History table that i want to return it after decoding json data in model function with each and every row

My query in controller is as follows

 $data = User::with('Payment.PaymentHistory')->get();

i was trying to do something like this in payment history model:

   public function json_response() 
    {
        return json_decode($json, TRUE);
    }

Any help is highly appreciated

via Chebli Mohamed