curl --request POST \
  --url https://api.hakumedia.ai/v2/creatives/image/{id}/replace-file \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: multipart/form-data' \
  --form file=@/path/to/image.png

const form = new FormData();
form.append('file', '@/path/to/image.png');

const options = {method: 'POST', headers: {Authorization: '<api-key>'}};

options.body = form;

fetch('https://api.hakumedia.ai/v2/creatives/image/{id}/replace-file', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.hakumedia.ai/v2/creatives/image/{id}/replace-file"

payload = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"\r\n\r\n@/path/to/image.png\r\n-----011000010111000001101001--"
headers = {"Authorization": "<api-key>"}

response = requests.post(url, data=payload, headers=headers)

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.hakumedia.ai/v2/creatives/image/{id}/replace-file",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"\r\n\r\n@/path/to/image.png\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: multipart/form-data"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

{
  "description": "",
  "group": 87,
  "name": "Demo Creative",
  "file_size": 329438,
  "uploaded_time": "2019-04-21 13:22:59",
  "height": 400,
  "width": 650,
  "object": "image_creative",
  "id": 115260,
  "self": "/v2/creatives/image/115260",
  "file_name": "creative.png",
  "mime_type": "image/png"
}