curl --request GET \
  --url https://www.anyfast.ai/kling/v1/general/advanced-custom-elements/{task_id} \
  --header 'Authorization: Bearer <token>'

{
  "code": 0,
  "message": "SUCCEED",
  "request_id": "747654a5-4407-4da5-99a6-b80bebc8035c",
  "data": {
    "task_id": "863121016086724692",
    "task_status": "succeed",
    "task_result": {
      "elements": [
        {
          "element_id": 863121023120580600,
          "element_name": "my-character",
          "element_description": "A protagonist character",
          "element_type": "image_refer",
          "element_image_list": {
            "frontal_image": "<string>",
            "refer_images": [
              {
                "image_url": "<string>"
              }
            ]
          },
          "owned_by": "<string>",
          "status": "succeed",
          "tag_list": [
            {
              "id": "<string>",
              "name": "<string>",
              "description": "<string>"
            }
          ]
        }
      ]
    },
    "task_status_msg": "",
    "created_at": 1773812605026,
    "updated_at": 1773812606753,
    "final_unit_deduction": "0"
  }
}