Function verify_object_body_sign 

pub async fn verify_object_body_sign<D, V, N>(
    verifier: &V,
    obj: &N,
    sign: &Signature,
) -> BuckyResult<bool>
where
    D: ObjectType,
    D::DescType: RawEncode,
    D::ContentType: RawEncode + BodyContent,
    V: Verifier,
    N: NamedObject<D>,