curl --request POST \
  --url 'https://api.flashcat.cloud/push/image/upload?integration_key=' \
  --header 'Content-Type: multipart/form-data' \
  --form image='@example-file'

{
  "data": {
    "image_key": "img_9d37d6ff4368407108b4cd3a47684a62"
  }
}