$result = \CRest::call(
'tasks.task.list',
[
'FILTER' => array('CREATED_BY'=>1, 'START_DATE_PLAN'=>" ",'END_DATE_PLAN'=>" ", 'TIME_ESTIMATE'=>0),
'select'=>array('ID','TITLE','CREATED_BY', 'START_DATE_PLAN', 'END_DATE_PLAN', 'TIME_ESTIMATE'),
'start' => -1
]
);