[{_id:ObjectId("6471fe4a0045e48a0c6193ba"),gateways:[{_id:"5231db1f-b79a-4dc3-a387-6f08ad7b6857",name:"Babylon Dev",right:"owner"}],__v:0,notifications:[{type:"confirm",title:"Gateway whitelist request!",description:"6471fe4a0045e48a0c6193ba wants to share data from gateway 5231db1f-b79a-4dc3-a387-6f08ad7b6857 with you.",actions:[],from:"6471fe4a0045e48a0c6193ba",subject:"5231db1f-b79a-4dc3-a387-6f08ad7b6857",status:"unread",_id:ObjectId("64b6791adbf7bb6eaa528cf2")}]}]

db.collection.aggregate([{$match:{_id:ObjectId("6471fe4a0045e48a0c6193ba")}},{$unwind:"$notifications"},{$replaceRoot:{newRoot:"$notifications"}}])