[JsonPropertyAttribute("user_id")]
public Identifier UserId { get; set; }

<JsonPropertyAttribute("user_id")>
Public Property UserId As Identifier
	Get
	Set

public:
[JsonPropertyAttribute(L"user_id")]
property Identifier^ UserId {
	Identifier^ get ();
	void set (Identifier^ value);
}

[<JsonPropertyAttribute("user_id")>]
member UserId : Identifier with get, set