curl --location --request GET 'https://test-api.yunjishop.cn/recommend/receivedLetter/'
{
"code": 0,
"msg": "string",
"trace": "string",
"data": {
"receivedId": 0,
"sentLetterId": 0,
"sentLetterUserId": 0,
"receivedLetterUserId": 0,
"createTime": "2019-08-24T14:15:22Z",
"isReply": 0
}
}