How to insert embeded document use eloquent or query builder

[abdrozak20]

i have request like this :
{
"title": "RA Persis 396 Bina Auladi",
"npsn": "20223807",
"address": "Jl. Radar Auri, Gang Swadaya IV RT",
"province_id": 1,
"city_id": 1,
"district_id": 1,
"sub_district_id": 1,
"gallery":[
{
"id":1,
"name":"Gallery1"
},
{
"id":2,
"name":"Gallery2"
}
]
}
and how i insert into one document.
i try like this :
$school = School::create([
"index"=>$index,
"title"=>$title,
"npsn"=>$npsn,
"address"=>$address,
"province_id"=>$province_id,
"city_id"=>$city_id,
"district_id"=>$district_id,
"sub_district_id"=>$sub_district_id,
"gallery"=>[
["id"=>1,"name"=>"gallery1"],
["id"=>2,"name"=>"gallery2"]
],
]);
success, but gallery not inserted.
any idea ? please help.
thanks in advice