How to parse the JSON with multiple structs?

[breakingbeats]

How can I parse the following Firebase Realtime Database JSON?

let firebaseRef = Database.database().reference()
firebaseRef.observe(.value, with: { (snapshot) in

guard let value = snapshot.value as? [String: [String: [String: Any]]] else { return print("type wrong") }
    do {
        let model = try FirebaseDecoder().decode(AllData.self, from: Array(value.values))
        print("model:", model)
    } catch let error {
         print("error", error)
    }

})

...and the following structs...

struct AllData: Codable {
let news: News
let events: Events
let crew: Crew
let artists: Artists
}
///////////////////////////////////
struct News: Codable {
let news: NewsDetail
}

struct NewsDetail: Codable {
let title: String
let subtitle: String
}
////////////////////////////////////
struct Artists: Codable {
let artist: NewsDetail
}

struct ArtistDetail: Codable {
let name: String
let image: String
}
//////////////////////////////////
struct Crew: Codable {
let member: Member
}

struct Member: Codable {
let name: String
let image: String
}
////////////////////////////////////
struct Events: Codable {
let event: EventDetail
}
struct EventDetail: Codable {
let title: String
let subtitle: String
let date: String
}

Also with guard let value = snapshot.value as? [String:Any] gives me a typeMismatch(Swift.Dictionary<Swift.String, Any>) error. Can anyone help?