acf api rest post or update
curl -X POST \
  https://example.com/wp-json/wp/v2/pages/9 \
  -H 'authorization: Bearer aVeryLongStringHere' \
  -d '{
	"fields": {
            "example_field": "some interesting update"
      }
}'
// works, 200, response:
{
	"acf": {
	    "example_field": "some interesting update"
	}
}
