Cannot set Put up ID correctly

I am attempting to generate posts primarily based on a JSON doc. I am caught on the attempting to assign the ID from the json doc to the submit’s wordpress ID. I learn on right here that the way in which of going about that is although setting an ‘import_id’ on wp_insert_post

$json = json_decode("{
        "tt1412213":{
           "title":"Movie",
           "rating":"excellent"
        }
    }", true);

foreach($json as $merchandise) { 
    $itemID = array_keys($json, $merchandise);
    if (get_post_status( $itemID ) == false ) {
        if($merchandise["title"] and $merchandise["rating"]){
            international $user_ID;
            wp_insert_post(array(
                'post_title' => $merchandise["title"],
                'post_content' => $merchandise["rating"],
                'post_status' => 'publish',
                'post_date' => date('Y-m-d H:i:s'),
                'post_author' => $user_ID,
                'post_type' => 'submit',
                'post_category' => array(0),
                'import_id' => $itemID
            ));
        }
    }
}

I would love my submit to have the ID tt1412213 however it defaults to a quantity as a substitute. Something I am lacking?