Use this operation to update any of the writable fields of an existing item object. The request body must include all writable fields of the existing object as returned in a read response. Writable fields omitted from the request body are set to NULL. The ID of the object to update is specified in the request body.Add the query parameter, include=donotupdateaccountontxns&minorversion=5, to the endpoint to supress updating the income or expense account on any existing transactions associated with this Item object. Updates on soft closed transacitons will fail.

Click Try It! to start a request and see the response here!