Api Rest in CakePHP: How to return id fields (Bigint) as string and not as INT/BIGINT?

I created a REST API in CakePHP 4.5, and all the ID fields are of type Bigint. Is there a way to force CakePHP to convert these fields to strings before returning the JSON?

There are many fields, and it would be impractical to edit each possible return function. I thought about defining this conversion in the EntityTable or the model.

Is that possible?

I tried this, but cake still returning id as INT

public function getSchema():TableSchema{
        $schema = parent::getSchema();
        $schema->setColumnType('id', 'string');
        return $schema;
    }