Структура IssueEntity :
'_id' : ObjectId, 'organizationId' : ObjectId, 'name' => string, 'description' => string, 'createDate' => int|null, 'updateDate' => int|null, 'closeDate' => int|null, 'changeDate' => int|null, 'priorityId' => ObjectId|null, 'statusId' => ObjectId|null, 'assignId' => ObjectId|null, 'progress' => int 0-100, 'estimatedTime' => int|null, 'spentTime' => int|null, 'endDate' => int|null, 'observers' => array [id : ObjectId, type : string (user, group, department, organization)], 'children' => ObjectId[] (IssueEntity ObjectIds), 'parents' => ObjectId[] (IssueEntity ObjectIds), 'milestoneId' => ObjectId|null, 'comments' => ObjectId[], 'relatedObjects' => array