问如何在API调用中仅为角8中的一个对象设置响应类型？

EN

public class A {
int id;
string name;
byte[] data;
}

[HttpGet]
[Route("~/api/getdata")]
public IActionResult GetData()
{
  A a = new A
    { id= 1,
      name = "JOHN",
      data = { 0, 0, 0, 25 } 
     };
  return Ok(a);
}

getData(): Observable<A> {
    return this.http.get<A>(`${API_URL}/api/getdata`).pipe(
      map(data => data)
    );
  }

export interface A {
id: number;
name: string;
data: ArrayBuffer;
}

getData(): Observable<A> {
   const httpOptions = {
     'responseType': 'arraybuffer' as 'json'
   };
    
   return this.http.get<A>(`${API_URL}/api/getdata`, httpOptions).pipe(
     map(data => data)
    );
}