Error:  Data structure returned is not convertible in the requested format. Try to call this method with the parameters '&amp;format=original&amp;serialize=1'; you will get the original php data structure serialized. The data structure looks like this: 
 $data = array (
  0 =&gt; 
  array (
    'idcustomdimension' =&gt; '1',
    'idsite' =&gt; '3',
    'name' =&gt; 'server_name',
    'index' =&gt; '1',
    'scope' =&gt; 'visit',
    'active' =&gt; true,
    'extractions' =&gt; 
    array (
    ),
    'case_sensitive' =&gt; true,
  ),
  1 =&gt; 
  array (
    'idcustomdimension' =&gt; '2',
    'idsite' =&gt; '3',
    'name' =&gt; 'tester_name',
    'index' =&gt; '2',
    'scope' =&gt; 'visit',
    'active' =&gt; true,
    'extractions' =&gt; 
    array (
    ),
    'case_sensitive' =&gt; true,
  ),
  2 =&gt; 
  array (
    'idcustomdimension' =&gt; '3',
    'idsite' =&gt; '3',
    'name' =&gt; 'scenario_title',
    'index' =&gt; '3',
    'scope' =&gt; 'visit',
    'active' =&gt; true,
    'extractions' =&gt; 
    array (
    ),
    'case_sensitive' =&gt; true,
  ),
);