Outbound REST Message Script API - RESTMessageV2().setStringParameter() does not escape accented letters correctly for JSON payloads with UTF-8 encoding

When using setStringParameter() function in a script to populate fields of an Outbound REST Message configuration, you may try to use escape international / accented characters (like á, à, í, ì, etc.) in a JSON payload. This may result in a failure on the other endpoint or cause escaping issues on ServiceNow instance.

Outbound REST Message configurations can be configured to send out payloads with XML or JSON notation. XML is a strict defined type, and many non-ASCII characters need to be encoded in their unicode equivalent representation (like á -> &#00E0). However, JSON is defined to accept UTF-8 encoded characters by default and does not need escaping. This is defined in the following RFC:

• https://tools.ietf.org/html/rfc8259#section-8.1

XML character escaping is not valid for JSON notation. Please use setStringParameterNoEscape(), instead of using setStringParameter() to send out accented letters as they are in a string. Payload should be accepted by the target endpoint.