Upload an image file and associate it with the specified article.
The unique identifier for the seller account. This ID is used to scope operations to a specific seller's data and resources.
The unique identifier for an article (product/SKU) in the system.
The MIME type of the file being uploaded (e.g., "image/jpeg", "image/png").
Returns the uploaded image information with assigned identifier, image metadata, and access URLs for the uploaded file.