The reference number of the object being connected to the alert
If alertUuid or objectUuid is not provided, objectReferenceNumber will be required
If objectReferenceNumber is the only identifier provided, the objectType will be required
If objectReferenceNumber is provided and deleteAll is '0', alertTypeCode will be required
Reference number format and length will vary depending on the object which it belongs to
Some allow alphaNumeric values, some only numeric and one capital alpha
Special characters allowed by some referenceNumbers: , . (comma, space, period)
Data type: string
Required: no
Letters: yes
Numbers: yes
Special: yes
Min: 5
Max: 50