[1] => stdClass Object
                (
                    [body] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [message] => Required fields are missing: [PricebookEntryId]
                                    [errorCode] => REQUIRED_FIELD_MISSING
                                    [fields] => Array
                                        (
                                            [0] => PricebookEntryId
                                        )

                                )

                            [1] => stdClass Object
                                (
                                    [message] => Order Products must have a Price Book Entry that belongs to the Price Book related to the parent Order.: Price Book Entry ID
                                    [errorCode] => FIELD_INTEGRITY_EXCEPTION
                                    [fields] => Array
                                        (
                                            [0] => PricebookEntryId
                                        )

                                )

                            [2] => stdClass Object
                                (
                                    [message] => Enter a List Price.: List Price
                                    [errorCode] => FIELD_INTEGRITY_EXCEPTION
                                    [fields] => Array
                                        (
                                            [0] => ListPrice
                                        )

                                )

                        )

                    [httpHeaders] => stdClass Object
                        (
                        )

                    [httpStatusCode] => 400
                    [referenceId] => orderItemRef0
                )