curl --request PUT \
  --url https://api.utage-system.com/v1/funnels/{funnel_id}/steps/{step_id}/pages/{page_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "content_type": "elements",
  "html_source": "<string>",
  "page_title": "<string>",
  "elements": [
    {}
  ],
  "meta_title": "<string>",
  "meta_description": "<string>",
  "meta_og_image": "<string>",
  "is_no_index": 0,
  "pc_width": 123,
  "border_type": "shadow",
  "swipe_type": "none",
  "background_color": "<string>",
  "background_image_src": "<string>",
  "background_image_style": "cover_fixed",
  "js_head": "<string>",
  "js_body_top": "<string>",
  "js_body": "<string>",
  "css": "<string>",
  "use_popup": 0,
  "popup_action": "exit",
  "popup_width": 800,
  "popup_background_color": "<string>",
  "popup_vertical_align": "top",
  "popup_elements": [
    {}
  ],
  "is_high_speed_mode": 0
}
'

{
  "data": {
    "id": "<string>",
    "funnel_id": "<string>",
    "step_id": "<string>",
    "title": "<string>",
    "content_type": "elements",
    "page_title": "<string>",
    "html_source": "<string>",
    "elements": [
      {}
    ],
    "meta_title": "<string>",
    "meta_description": "<string>",
    "meta_og_image": "<string>",
    "is_no_index": 0,
    "pc_width": 123,
    "border_type": "shadow",
    "swipe_type": "none",
    "background_color": "<string>",
    "background_image_src": "<string>",
    "background_image_style": "cover_fixed",
    "js_head": "<string>",
    "js_body_top": "<string>",
    "js_body": "<string>",
    "css": "<string>",
    "use_popup": 0,
    "popup_action": "exit",
    "popup_width": 123,
    "popup_background_color": "<string>",
    "popup_vertical_align": "top",
    "popup_elements": [
      {}
    ],
    "is_high_speed_mode": 0,
    "step_url": "<string>"
  }
}