Save draft

Saves LinkedIn post text (up to 3,000 characters) as a draft, or updates an existing unpublished post. Without id it creates a draft. With id it updates a draft or a scheduled post that has not been sent; the schedule time and destination stay as they are and nothing is sent to LinkedIn. content is required to create; an update takes content and/or media, and optionally destination, mentions, first_comment, or auto_react. first_comment and auto_react are stored on the post and applied when it is published by schedule_post or publish_now. mentions tags LinkedIn company pages named in the text; people cannot be tagged. destination selects the personal profile or a company page from list_destinations. media attaches images, a video, or a PDF. Each media item has exactly one source: { url } for a public HTTPS file, { upload_id } for a file sent through create_upload, or { data } for a small base64 file up to 4MB. PostPen checks each file and copies it into its own storage. On an update, omitting media keeps existing attachments and media: [] removes them. media_urls and LinkedIn tokens are not accepted.