How to handle complex filters in Rest API requests?

Question

In Rest Apis good practices recommend:

• GET - List data;
• POST - Think;
• PUT - Update data;
• DELETE - Erase data.

Following good practices, to recover a list of data we should use GET and for filters we should use query string.

Doubt

In the case of complex filters, 25 fields or more and/or a filter containing an array of ids, that can generate a URL with more than 2048 characters (this is bad practice).

What would be the "best" approach to be used?

• Send the filter on Header in the JSON standard?
• Use the method POST instead of the method GET?
• Another solution?