Update a blog post.

Pass markup to update the post's visual content via PML. It replaces the whole body, and PML covers only a subset of what the ClickFunnels editor can build, so if this post could have been written or edited in the editor, stop and get explicit approval from the user first: see the approval guardrail. Omit markup to change only metadata. Invalid markup returns 400 and neither the post metadata nor the markup is saved. Pass expand[]=markup to have the markup returned in the response.

See Updating a blog post in the Blogs Skill. To publish a draft, see Publish separately and Two gotchas worth knowing.