When updating a PayPal order using the REST API, we typically do it as below according to the documentation at https://developer.paypal.com/docs/api/orders/v2/#orders_patch
curl -v -X PATCH https://api-m.sandbox.paypal.com/v2/checkout/orders/5O190127TN364715T \-H 'Content-Type: application/json' \-H 'Authorization: Bearer access_token' \-d '[ {"op": "add","path": "/purchase_units/@reference_id==\'PUHF\'/shipping/address","value": {"address_line_1": "2211 N First Street","address_line_2": "Building 17","admin_area_2": "San Jose","admin_area_1": "CA","postal_code": "95131","country_code": "US" } }]'However when trying to update the custom_id or invoice_id, it gives a validation error when trying to put a value in the "value" key since these do not represent an object like the example above.I've tried using the key "integration_artifact" as seen in an example at https://developer.paypal.com/docs/multiparty/checkout/advanced/customize/update-order-details/ but this results in an error as well
curl -v -X PATCH https://api-m.sandbox.paypal.com/v2/checkout/orders/5O190127TN364715T \-H 'Content-Type: application/json' \-H 'Authorization: Bearer access_token' \-d '[ {"op": "replace","path": "/purchase_units/@reference_id==\'PUHF\'/custom_id","value": {"integration_artifact": "CUSTOM_ID" } }]'The error
{"name": "UNPROCESSABLE_ENTITY","details": [ {"issue": "VALIDATION_ERROR","links": [],"description": "VALIDATION_ERROR" } ],"message": "The requested action could not be performed, semantically incorrect, or failed business validation.","debug_id": "fca96d06c1409","links": [ {"href": "https://developer.paypal.com/docs/api/orders/v2/#error-VALIDATION_ERROR","rel": "information_link" } ]}What should I put in the value for custom_id/invoice_id when the value should just be a string?