how to send json into kafka using zeebe kafka connector?

Question

I'm trying to send a json into kafka using zeebe kafka connector. zeebe changes the format of json. it replaces colon (:) with equal (=) and replaces double quotation (") with quotation (').

for example:

{ "id": "1234"}

changes into

{ 'id'='1234'}

but I don't want this transformation happen.how can I solve this problem?