Post

MultiValueMap<String, Object> stringObjectHashMap = new LinkedMultiValueMap<>();
Map<String, Object> convert = MapUtil.object2Map(tokenRequestEntity);
convert.forEach((key,value) -> {
    stringObjectHashMap.put(key, Collections.singletonList(value));
});
TokenResponseVo ss = restTemplate.postForEntity(
    tokenApi,
    stringObjectHashMap, TokenResponseVo.class
).getBody();