拖拉拽表单该如何存入数据库并取出？

Question

求一个思路

拖拉拽表单存入哪个数据库会方便存储并取出

使用的后端语言是Java

目前思路：
生成json格式存入MongoDB，但是由于是拖拉拽表单，json格式每次的字段key都不一致，该如何映射到实体类
或者用最蠢的方法，string存储json，全部堆一起，由前端渲染（实验过，可行）

以下为json数据

{
    "formDataList": [{
        "fieldId": "Password_1629423281596",
        "name": "Password",
        "label": "密码",
        "placeholder": "请输入密码",
        "value": "",
        "rules": {},
        "makeStyle": {
            "active": true
        },
        "style": {},
        "setting": {
            "prefixIcon": "el-icon-lock",
            "suffixIcon": ""
        }
    }, {
        "fieldId": "Input_1629423347125",
        "name": "Input",
        "label": "单行文本",
        "placeholder": "请输入",
        "value": "",
        "rules": {},
        "makeStyle": {
            "active": false
        },
        "style": {},
        "setting": {
            "prefixIcon": "",
            "suffixIcon": ""
        }
    }, {
        "name": "Divider",
        "label": "分割线",
        "makeStyle": {
            "active": false
        },
        "style": {
            "hideLabel": true
        },
        "setting": {
            "direction": "horizontal",
            "contentPosition": "center",
            "content": "这里是分割线",
            "icon": ""
        },
        "fieldId": "Divider_1630026701208"
    }],
    "formStyle": {
        "hideLabel": false,
        "labelWidth": "85px",
        "labelPosition": "right",
        "showRequiredAsterisk": true,
        "showVerificationMessage": true,
        "size": "medium",
        "labelSuffix": ":"
    },
    "model": {
        "Password_1629423281596": "",
        "Input_1629423347125": ""
    }
}

model的key就是表单的id，表单通过model的key获取到表单的value，所以model的key每次都不一样

如何在不修改json的情况下完成，或者有更好的方法或思路，有好的拖拉拽也可以推荐一下，求

附上一张MongoDB存储的json结构的数据