Uploads a document to a manual journal entry

Appends one PDF, JPEG, PNG, or XLSX of at most 20 MiB to an existing manual journal entry. Create the journal entry first; for asynchronous imports, wait until the entry is available. Existing attachments are preserved. Repeating an upload creates another attachment. A journal entry can have at most 10 attachments, including files uploaded through the Rillet application. Attachments may be added to approved entries and entries in closed periods without changing accounting data or approval status. System-generated and non-posting entries are not supported.