SignData Invalid - Javascript placeOrder #10

{ code: '1016',
  success: false,
  time: 1554439494501,
  message: 'SignData Invalid' }

var crypto = require('crypto')
var axios = require('axios');
var querystring = require('querystring');

var accessKey = 'xxx'
var secretKey = 'secretxxx'

var amount = "1"
var nonce = (new Date).getTime().toString();
var price = "0.00015393"
var symbol = "coin-eth-bf"
var tradeType = "1"

var message = `/api/v1/trade/placeOrder?accessKey=${accessKey}&amount=${amount}&nonce=${nonce}price=${price}&symbol=${symbol}&tradeType=${tradeType}`;
var hash = crypto.createHmac('sha256', secretKey).update(encodeURI(message));
var signData = hash.digest('hex');

var url_a= 'https://api.bitforex.com/api/v1/trade/placeOrder';

const data = {
    accessKey: accessKey,
    amount: amount,
    nonce: nonce,
    price: price,
    symbol: symbol,
    signData: signData,
    tradeType:tradeType
 };


const options = {
  method: 'POST',
  headers: { 'content-type': 'application/x-www-form-urlencoded' },
  data: encodeURI(querystring.stringify(data)),
  url: url_a
};
axios(options).then(function (response) {
    console.log(response.data);
    })
    .catch(function (error) {
    console.log(error);
    });