axios({

  url: '/user',

  method: 'post',

  data: {

    firstName: 'Fred',

    lastName: 'Flintstone'

  },

  transformRequest: [function (data) {

    let ret = ''

    for (let it in data) {

      ret += encodeURIComponent(it) + '=' + encodeURIComponent(data[it]) + '&'

    }

    return ret

  }],

  headers: {

    'Content-Type': 'application/x-www-form-urlencoded'

  }

})