curl --request POST \
  --url https://api.example.com/claims/investigation \
  --header 'Content-Type: application/json' \
  --data '
{
  "shipmentId": "2340923434",
  "trackingCode": "DE062750105355XZ",
  "shopOrderId": "20314532264784",
  "carrier": {
    "name": "dhl",
    "country": "de"
  },
  "isReturnShipment": false,
  "firstHubScanDate": "2019-06-30T12:34:06+00:00",
  "netValue": 10.5,
  "netValueCurrency": "EUR",
  "recipientName": "Federico Garcia",
  "recipientCity": "Berlin",
  "recipientZipCode": "<string>",
  "trackingScreenshot": 102545,
  "weight": 1.52,
  "deliveryDate": "2019-06-30T12:34:06+00:00",
  "postalReturnDeliveryDate": "2019-06-30T12:34:06+00:00",
  "declarationOfRecipient": 102545,
  "investigationComment": "Can not find it"
}
'

import requests

url = "https://api.example.com/claims/investigation"

payload = {
    "shipmentId": "2340923434",
    "trackingCode": "DE062750105355XZ",
    "shopOrderId": "20314532264784",
    "carrier": {
        "name": "dhl",
        "country": "de"
    },
    "isReturnShipment": False,
    "firstHubScanDate": "2019-06-30T12:34:06+00:00",
    "netValue": 10.5,
    "netValueCurrency": "EUR",
    "recipientName": "Federico Garcia",
    "recipientCity": "Berlin",
    "recipientZipCode": "<string>",
    "trackingScreenshot": 102545,
    "weight": 1.52,
    "deliveryDate": "2019-06-30T12:34:06+00:00",
    "postalReturnDeliveryDate": "2019-06-30T12:34:06+00:00",
    "declarationOfRecipient": 102545,
    "investigationComment": "Can not find it"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    shipmentId: '2340923434',
    trackingCode: 'DE062750105355XZ',
    shopOrderId: '20314532264784',
    carrier: {name: 'dhl', country: 'de'},
    isReturnShipment: false,
    firstHubScanDate: '2019-06-30T12:34:06+00:00',
    netValue: 10.5,
    netValueCurrency: 'EUR',
    recipientName: 'Federico Garcia',
    recipientCity: 'Berlin',
    recipientZipCode: '<string>',
    trackingScreenshot: 102545,
    weight: 1.52,
    deliveryDate: '2019-06-30T12:34:06+00:00',
    postalReturnDeliveryDate: '2019-06-30T12:34:06+00:00',
    declarationOfRecipient: 102545,
    investigationComment: 'Can not find it'
  })
};

fetch('https://api.example.com/claims/investigation', 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.example.com/claims/investigation",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'shipmentId' => '2340923434',
    'trackingCode' => 'DE062750105355XZ',
    'shopOrderId' => '20314532264784',
    'carrier' => [
        'name' => 'dhl',
        'country' => 'de'
    ],
    'isReturnShipment' => false,
    'firstHubScanDate' => '2019-06-30T12:34:06+00:00',
    'netValue' => 10.5,
    'netValueCurrency' => 'EUR',
    'recipientName' => 'Federico Garcia',
    'recipientCity' => 'Berlin',
    'recipientZipCode' => '<string>',
    'trackingScreenshot' => 102545,
    'weight' => 1.52,
    'deliveryDate' => '2019-06-30T12:34:06+00:00',
    'postalReturnDeliveryDate' => '2019-06-30T12:34:06+00:00',
    'declarationOfRecipient' => 102545,
    'investigationComment' => 'Can not find it'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.example.com/claims/investigation"

	payload := strings.NewReader("{\n  \"shipmentId\": \"2340923434\",\n  \"trackingCode\": \"DE062750105355XZ\",\n  \"shopOrderId\": \"20314532264784\",\n  \"carrier\": {\n    \"name\": \"dhl\",\n    \"country\": \"de\"\n  },\n  \"isReturnShipment\": false,\n  \"firstHubScanDate\": \"2019-06-30T12:34:06+00:00\",\n  \"netValue\": 10.5,\n  \"netValueCurrency\": \"EUR\",\n  \"recipientName\": \"Federico Garcia\",\n  \"recipientCity\": \"Berlin\",\n  \"recipientZipCode\": \"<string>\",\n  \"trackingScreenshot\": 102545,\n  \"weight\": 1.52,\n  \"deliveryDate\": \"2019-06-30T12:34:06+00:00\",\n  \"postalReturnDeliveryDate\": \"2019-06-30T12:34:06+00:00\",\n  \"declarationOfRecipient\": 102545,\n  \"investigationComment\": \"Can not find it\"\n}")

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

	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.post("https://api.example.com/claims/investigation")
  .header("Content-Type", "application/json")
  .body("{\n  \"shipmentId\": \"2340923434\",\n  \"trackingCode\": \"DE062750105355XZ\",\n  \"shopOrderId\": \"20314532264784\",\n  \"carrier\": {\n    \"name\": \"dhl\",\n    \"country\": \"de\"\n  },\n  \"isReturnShipment\": false,\n  \"firstHubScanDate\": \"2019-06-30T12:34:06+00:00\",\n  \"netValue\": 10.5,\n  \"netValueCurrency\": \"EUR\",\n  \"recipientName\": \"Federico Garcia\",\n  \"recipientCity\": \"Berlin\",\n  \"recipientZipCode\": \"<string>\",\n  \"trackingScreenshot\": 102545,\n  \"weight\": 1.52,\n  \"deliveryDate\": \"2019-06-30T12:34:06+00:00\",\n  \"postalReturnDeliveryDate\": \"2019-06-30T12:34:06+00:00\",\n  \"declarationOfRecipient\": 102545,\n  \"investigationComment\": \"Can not find it\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/claims/investigation")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"shipmentId\": \"2340923434\",\n  \"trackingCode\": \"DE062750105355XZ\",\n  \"shopOrderId\": \"20314532264784\",\n  \"carrier\": {\n    \"name\": \"dhl\",\n    \"country\": \"de\"\n  },\n  \"isReturnShipment\": false,\n  \"firstHubScanDate\": \"2019-06-30T12:34:06+00:00\",\n  \"netValue\": 10.5,\n  \"netValueCurrency\": \"EUR\",\n  \"recipientName\": \"Federico Garcia\",\n  \"recipientCity\": \"Berlin\",\n  \"recipientZipCode\": \"<string>\",\n  \"trackingScreenshot\": 102545,\n  \"weight\": 1.52,\n  \"deliveryDate\": \"2019-06-30T12:34:06+00:00\",\n  \"postalReturnDeliveryDate\": \"2019-06-30T12:34:06+00:00\",\n  \"declarationOfRecipient\": 102545,\n  \"investigationComment\": \"Can not find it\"\n}"

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

{
  "id": "20200301_DE062750105355XZ",
  "shipmentId": "2340923434",
  "trackingCode": "DE062750105355XZ",
  "shopOrderId": "20314532264784",
  "carrier": {
    "name": "dhl",
    "country": "de"
  },
  "isReturnShipment": false,
  "firstHubScanDate": "2019-06-30T12:34:06+00:00",
  "deliveryDate": "2019-06-30T12:34:06+00:00",
  "postalReturnDeliveryDate": "2019-06-30T12:34:06+00:00",
  "netValue": 10.5,
  "netValueCurrency": "EUR",
  "recipientName": "Federico Garcia",
  "recipientCity": "Berlin",
  "recipientZipCode": "<string>",
  "weight": 1.52
}