Insert a new object. The object type can be user, group, document or
anchor. Depending on the type other object attributes has to be set.
The parameter array contains the required elements 'object' and 'content'
(if the object is a document) and the optional parameters 'parameters',
'mode' and 'attributeSelector'. The 'object' must contain all attributes
of the object. 'parameters' is an object as well holding further
attributes like the destination (attribute key is 'Parent'). 'content' is
the content of the document. 'mode' can be a
combination of the following flags: