BASH Code Error

[Mehdi1m]

I have written a BASH code to trade with COinex.com API after some calculation in BASH environment. When I run this code I get a Signature error, I will be grateful for your feedbacks and guidelines.

        #!/bin/bash

#A code to put a market order in the www.coinex.com exchange pairs 

#My Access ID in www.coinex.com  
access_id="xxxx" 
#My secrect Key  in www.coinex.com  
secret_key="xxxx"  
#Request Url 
get_url="https://api.coinex.com/v1/order/market" 
#Any Amount 
amount="0.1"  
#Any pair in the Market
market="ARUSDT"  
#buy or sell
type="sell" 

#Get server time, Tonce is a timestamp with a positive Integer that represents the number of milliseconds from Unix epoch to the current time. Error between tonce and server time can not exceed plus or minus 60s
tonce=`curl -X GET  https://api.coinex.com/v1/market/ticker/all |  jq .data.date`

#authorization code using 32-bit MD5 Algorithm Signature
authorization=`echo 'access_id='$access_id'&amount='$amount'&market='$market'&tonce='$tonce'&type='$type'&secret_key='$secret_key''|md5sum| cut -d' ' -f1`
echo 'access_id='$access_id'&amount='$amount'&market='$market'&tonce='$tonce'&type='$type'&secret_key='$secret_key''
#Convert authorization to UPPERCASE

authorization1=`echo ${authorization^^}`

# The JSON data format for jq command
# Important: $token are not for bash variables but for jq arguments
#            So, DATA_FORMAT must be defined between simple cotes (not double) 
declare DATA_FORMAT='{"access_id": $access_id, "amount": $amount, "market": $market, "tonce": $tonce, "type": $type}'

# jq call to format JSON data
# The jq arguments in data format will be replaced by bash variable values (in this example, with the same name) 
DATA_CONTENT=$(jq \
        --null-input \
        --arg access_id   "${access_id}"   \
        --arg amount      "${amount}"      \
        --arg market      "${market}"      \
        --arg tonce       "${tonce}"       \
        --arg type        "${type}" \
        "${DATA_FORMAT}" \
    )
set -x 
# cURL call
curl -i  \
    -v \
    -H "authorization: Bearer  $authorization1 " \
    -H "Content-Type: application/json" \
     -d "${DATA_CONTENT}" \
      --url "$get_url"

I get the following error:

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  150k    0  150k    0     0   113k      0 --:--:--  0:00:01 --:--:--  113k
access_id=XXXX&amount=0.1&market=ARUSDT&tonce=1637401904541&type=sell&secret_key=XXXX
++ curl -i -v -H 'authorization: Bearer  396CC97A7C8A86F349E52BB41AE47387 ' -H 'Content-Type: application/json' -d '{
  "access_id": "03390D6C59336CF1D1",
  "amount": "0.1",
  "market": "ARUSDT",
  "tonce": "1637401904541",
  "type": "sell"
}' --url https://api.coinex.com/v1/order/market
*   Trying 104.18.30.180:443...
* TCP_NODELAY set
* Connected to api.coinex.com (104.18.30.180) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use h2
* Server certificate:
*  subject: C=US; ST=California; L=San Francisco; O=Cloudflare, Inc.; CN=coinex.com
*  start date: Nov  1 00:00:00 2021 GMT
*  expire date: Oct 31 23:59:59 2022 GMT
*  subjectAltName: host "api.coinex.com" matched cert's "*.coinex.com"
*  issuer: C=US; O=Cloudflare, Inc.; CN=Cloudflare Inc ECC CA-3
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x561aa81e1c80)
> POST /v1/order/market HTTP/2
> Host: api.coinex.com
> user-agent: curl/7.68.0
> accept: */*
> authorization: Bearer  396CC97A7C8A86F349E52BB41AE47387 
> content-type: application/json
> content-length: 140
> 
* We are completely uploaded and fine
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* old SSL session ID is stale, removing
* Connection state changed (MAX_CONCURRENT_STREAMS == 256)!
< HTTP/2 200 
HTTP/2 200 
< date: Sat, 20 Nov 2021 09:51:46 GMT
date: Sat, 20 Nov 2021 09:51:46 GMT
< content-type: application/json
content-type: application/json
< content-length: 58
content-length: 58
< cf-cache-status: DYNAMIC
cf-cache-status: DYNAMIC
< expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
< server: cloudflare
server: cloudflare
< cf-ray: 6b10c819aa2e752d-LHR
cf-ray: 6b10c819aa2e752d-LHR

< 
* Connection #0 to host api.coinex.com left intact
{"code": 25, "data": {}, "message": "Signature Incorrect"}