curl --request POST \
  --url https://api.example.com/api/v1/subscription/update \
  --header 'Content-Type: application/json' \
  --data '
{
  "subscriptionRequest": "<subscriptionRequest>",
  "subscriptionId": "<subscriptionId>",
  "amount": 100,
  "productInfo": {
    "trialPeriodAmount": 0,
    "scheduledAmounts": [
      {
        "period": "<string>",
        "amount": "<string>"
      }
    ]
  }
}
'

import requests

url = "https://api.example.com/api/v1/subscription/update"

payload = {
    "subscriptionRequest": "<subscriptionRequest>",
    "subscriptionId": "<subscriptionId>",
    "amount": 100,
    "productInfo": {
        "trialPeriodAmount": 0,
        "scheduledAmounts": [
            {
                "period": "<string>",
                "amount": "<string>"
            }
        ]
    }
}
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({
    subscriptionRequest: '<subscriptionRequest>',
    subscriptionId: '<subscriptionId>',
    amount: 100,
    productInfo: {
      trialPeriodAmount: 0,
      scheduledAmounts: [{period: '<string>', amount: '<string>'}]
    }
  })
};

fetch('https://api.example.com/api/v1/subscription/update', 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/api/v1/subscription/update",
  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([
    'subscriptionRequest' => '<subscriptionRequest>',
    'subscriptionId' => '<subscriptionId>',
    'amount' => 100,
    'productInfo' => [
        'trialPeriodAmount' => 0,
        'scheduledAmounts' => [
                [
                                'period' => '<string>',
                                'amount' => '<string>'
                ]
        ]
    ]
  ]),
  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/api/v1/subscription/update"

	payload := strings.NewReader("{\n  \"subscriptionRequest\": \"<subscriptionRequest>\",\n  \"subscriptionId\": \"<subscriptionId>\",\n  \"amount\": 100,\n  \"productInfo\": {\n    \"trialPeriodAmount\": 0,\n    \"scheduledAmounts\": [\n      {\n        \"period\": \"<string>\",\n        \"amount\": \"<string>\"\n      }\n    ]\n  }\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/api/v1/subscription/update")
  .header("Content-Type", "application/json")
  .body("{\n  \"subscriptionRequest\": \"<subscriptionRequest>\",\n  \"subscriptionId\": \"<subscriptionId>\",\n  \"amount\": 100,\n  \"productInfo\": {\n    \"trialPeriodAmount\": 0,\n    \"scheduledAmounts\": [\n      {\n        \"period\": \"<string>\",\n        \"amount\": \"<string>\"\n      }\n    ]\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/api/v1/subscription/update")

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  \"subscriptionRequest\": \"<subscriptionRequest>\",\n  \"subscriptionId\": \"<subscriptionId>\",\n  \"amount\": 100,\n  \"productInfo\": {\n    \"trialPeriodAmount\": 0,\n    \"scheduledAmounts\": [\n      {\n        \"period\": \"<string>\",\n        \"amount\": \"<string>\"\n      }\n    ]\n  }\n}"

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

{
  "code": 0,
  "msg": "success",
  "data": {
    "subscriptionId": "<string>",
    "subscriptionRequest": "<string>",
    "previousTrialPeriodAmount": "<string>",
    "newTrialPeriodAmount": "<string>",
    "previousAmount": "<string>",
    "newAmount": "<string>",
    "previousScheduledAmounts": [
      {
        "period": "<string>",
        "amount": "<string>"
      }
    ],
    "newScheduledAmounts": [
      {
        "period": "<string>",
        "amount": "<string>"
      }
    ],
    "nextEffectivePeriod": "<string>"
  }
}