JSFiddle - React, Tailwind, and code Playground

JavaScript

var departments = [
    {"field"    : "DEPARTMAN_NO",
     "data"     : { "type":"numeric" , "comparison":"eq" , "value":11 }
    },
    {"field"    : "DEPARTMAN_ADI",
     "data"     : { "type":"string" , "value":"bir" }
    }
],
obj;
for (var i = 0, len = departments.length; i < len; i++) {
    obj = departments[i];
    for (var key in obj) {
        if (key !== 'data' && obj.data) {
            obj.data[key] = obj[key];
        }
    }
    departments[i] = obj.data || obj;
}
console.log(departments);