curl --request PATCH \
  --url https://api.zerion.io/v1/tx-subscriptions/{subscription_id}/callback_url \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "callback_url": "https://webhook.site/new-callback-url"
}
'

import requests

url = "https://api.zerion.io/v1/tx-subscriptions/{subscription_id}/callback_url"

payload = { "callback_url": "https://webhook.site/new-callback-url" }
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({callback_url: 'https://webhook.site/new-callback-url'})
};

fetch('https://api.zerion.io/v1/tx-subscriptions/{subscription_id}/callback_url', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

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

func main() {

	url := "https://api.zerion.io/v1/tx-subscriptions/{subscription_id}/callback_url"

	payload := strings.NewReader("{\n  \"callback_url\": \"https://webhook.site/new-callback-url\"\n}")

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

	req.Header.Add("Authorization", "Basic <encoded-value>")
	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))

}

{
  "errors": [
    {
      "title": "Parameter is malformed",
      "detail": "Some validation errors will be described here"
    }
  ]
}

{
  "errors": [
    {
      "title": "Unauthorized Error",
      "detail": "The API key is invalid, please, make sure that you are using a valid key"
    }
  ]
}

{
  "errors": [
    {
      "title": "Too many requests",
      "detail": "Your request had been throttled"
    }
  ]
}