Rest-Assured returns the code 400, when a Postman with an identical request is 200

Question

Tell me, there was a problem, the search did not lead to a suitable solution. Briefly: the response code in Rest-Assured for some requests differs from Postman (in postman 200, in RA 400) I tried to set in the config standard UTF-8 with Google, it didn't work out, please tell me how can I do it? Requests - POST config code (2nd line is an extreme attempt to install a charset):

@BeforeEach
void setupRequestSpecBuilder() {
        RestAssured.reset();
        RestAssured.config = RestAssured.config().decoderConfig(decoderConfig().defaultContentCharset("UTF-8"));
        RequestSpecification requestSpec = new RequestSpecBuilder()
                .setAccept(ContentType.JSON)
                .setContentType(ContentType.ANY)
                .build()
                .auth()
                .basic(login, password)
                .header("Accept-Encoding", "gzip, deflate, br");

        RestAssured.requestSpecification = requestSpec;
    }