I want to create a logging table which tracks changes in a certain table, like so:

CREATE TABLE logging.zaak_history (
  event_id                  bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
  tstamp                    timestamp       DEFAULT NOW(),
  schemaname                text,
  tabname                   text,
  columnname                text,
  operation                 text,
  who                       text            DEFAULT current_user,
  new_val                   <any_type>,
  old_val                   <any_type>
);

However, the column that I want to track can take different datatypes, such as text, boolean and numeric. Is there a datatype that support the functionality?
Currently I am thinking about storing is as jsonb, as this will deal with the datatype in the json formatting, but I was wondering if there is a better way.