Set and update existing user-defined fields for objects through API calls.
You can set values for these fields in the properties parameter where they are noted. If you set or update a value for a non-existent UDF, an exception is thrown. These are passed as name-value pairs, and multiple UDFs are separated by a pipe (|) character. For example, to set values of two UDFs: TextUDF and IntegerUDF, with the values testTextValue and 1005, you should pass the properties string as: