curl --request PATCH \
  --url https://api.zivio.net/api/v3/purchase_orders/{id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --header 'zivio-tenant-id: <api-key>' \
  --data '
{
  "external_provider": "External System",
  "external_id": "ExSys67687",
  "po_number": "ExSys67687",
  "status": "issued",
  "version": "0",
  "owners": {
    "job": "23",
    "supplier": "23"
  }
}
'

import requests

url = "https://api.zivio.net/api/v3/purchase_orders/{id}"

payload = {
    "external_provider": "External System",
    "external_id": "ExSys67687",
    "po_number": "ExSys67687",
    "status": "issued",
    "version": "0",
    "owners": {
        "job": "23",
        "supplier": "23"
    }
}
headers = {
    "X-API-Key": "<api-key>",
    "zivio-tenant-id": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.patch(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PATCH',
  headers: {
    'X-API-Key': '<api-key>',
    'zivio-tenant-id': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    external_provider: 'External System',
    external_id: 'ExSys67687',
    po_number: 'ExSys67687',
    status: 'issued',
    version: '0',
    owners: {job: '23', supplier: '23'}
  })
};

fetch('https://api.zivio.net/api/v3/purchase_orders/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.zivio.net/api/v3/purchase_orders/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'external_provider' => 'External System',
    'external_id' => 'ExSys67687',
    'po_number' => 'ExSys67687',
    'status' => 'issued',
    'version' => '0',
    'owners' => [
        'job' => '23',
        'supplier' => '23'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>",
    "zivio-tenant-id: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.zivio.net/api/v3/purchase_orders/{id}"

	payload := strings.NewReader("{\n  \"external_provider\": \"External System\",\n  \"external_id\": \"ExSys67687\",\n  \"po_number\": \"ExSys67687\",\n  \"status\": \"issued\",\n  \"version\": \"0\",\n  \"owners\": {\n    \"job\": \"23\",\n    \"supplier\": \"23\"\n  }\n}")

	req, _ := http.NewRequest("PATCH", url, payload)

	req.Header.Add("X-API-Key", "<api-key>")
	req.Header.Add("zivio-tenant-id", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.patch("https://api.zivio.net/api/v3/purchase_orders/{id}")
  .header("X-API-Key", "<api-key>")
  .header("zivio-tenant-id", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"external_provider\": \"External System\",\n  \"external_id\": \"ExSys67687\",\n  \"po_number\": \"ExSys67687\",\n  \"status\": \"issued\",\n  \"version\": \"0\",\n  \"owners\": {\n    \"job\": \"23\",\n    \"supplier\": \"23\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.zivio.net/api/v3/purchase_orders/{id}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Patch.new(url)
request["X-API-Key"] = '<api-key>'
request["zivio-tenant-id"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"external_provider\": \"External System\",\n  \"external_id\": \"ExSys67687\",\n  \"po_number\": \"ExSys67687\",\n  \"status\": \"issued\",\n  \"version\": \"0\",\n  \"owners\": {\n    \"job\": \"23\",\n    \"supplier\": \"23\"\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "id": "23",
  "external_provider": "External Service",
  "external_id": "EX67868",
  "po_number": "EX67868",
  "version": 123,
  "status": "<string>",
  "owners": {
    "job": "2",
    "supplier": "2"
  }
}