Database
[{_id:"003fjasf0234j03j0349",FirstLayer:{SecondLayer:{Status:{9428f:{active:"Active"}}}}},{_id:"qg3o4034034nr34343",FirstLayer:{SecondLayer:{Status:{9428f:{active:"Active"}}}}},{_id:"293je2odjojwe0f23",FirstLayer:{SecondLayer:{Status:{00fekw:{active:"Not Active"}}}}}]
Query
db.collection.aggregate([{$match:{$expr:{$let:{vars:{status:{$objectToArray:"$FirstLayer.SecondLayer.Status"}},in:{$size:{$filter:{input:"$$status",cond:{$eq:["$$this.v.active","Active"]}}}}}}}},{$sample:{size:50}}])