how i cant sent request body via curl [closed]

i have code php form$post = "a=1&b=2&c=3&d=4&d=5"; $curl->guipost($post); $curl->xemtrang("https://url.com/");` this worker but now i have `$post2 = "{"Details":{"address":{"countryId":00,"zipCode":"10000","stateProvinceId":00,"address1":"my home","address2":"","city":"my city"},"email":"myemail@domain.com"}}";i cant run on php, pleas help me to edit $post2 to running