currencies – how to place a bitforex api buy order

I have read the documentation for BitForex on placing a buy order here:
https://github.com/bitforexapi/API_Doc_en/wiki/Order

Then after understanding that, I read the API Call Description documentation:
https://github.com/bitforexapi/API_Doc_en/wiki/API-Call-Description

Here is what I have in my code:

var crypto = require('crypto')
var axios = require('axios');
var accessKey = 'xxx';
var secretKey = 'xxx';

var nonce = Date.now().toString();

var amount = "1"
var price = "0.00015393"
var symbol = "coin-eth-bf"

// tradeType 1 is buy , tradeType 2 is sell
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(message);
var signData = hash.digest('hex');
axios.post(`https://api.bitforex.com/api/v1/trade/placeOrder?accessKey=${accessKey}&amount=${amount}&nonce=${nonce}price=${price}&symbol=${symbol}&tradeType=${tradeType}`)
    .then(function (response) {
    console.log(response.data);
    })
    .catch(function (error) {
    console.log(error);
    });

I keep getting an error:

{ code: '1011',
  success: false,
  time: xxx,
  message: 'NeedParam accessKey and signData' }

I am currently at a loss to why I keep receive this error.
I am passing both the accessKey and signData in.
The part that is fuzzy to me is the signData.

1. Am I creating the signData properly based on the documentation?
2. Also, am does order matter for the parameters that are being passed
3. in? Anything else I may potentially be doing wrong?