curl --request POST \
  --url https://api.sunoapi.org/api/v1/generate/replace-section \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "taskId": "2fac****9f72",
  "audioId": "e231****-****-****-****-****8cadc7dc",
  "prompt": "A calm and relaxing piano track.",
  "tags": "Jazz",
  "title": "Relaxing Piano",
  "negativeTags": "Rock",
  "infillStartS": 10.5,
  "infillEndS": 20.75,
  "fullLyrics": "[Verse 1]\nOriginal lyrics here\n[Chorus]\nModified lyrics for this section\n[Verse 2]\nMore original lyrics",
  "callBackUrl": "https://example.com/callback"
}
'

import requests

url = "https://api.sunoapi.org/api/v1/generate/replace-section"

payload = {
    "taskId": "2fac****9f72",
    "audioId": "e231****-****-****-****-****8cadc7dc",
    "prompt": "A calm and relaxing piano track.",
    "tags": "Jazz",
    "title": "Relaxing Piano",
    "negativeTags": "Rock",
    "infillStartS": 10.5,
    "infillEndS": 20.75,
    "fullLyrics": "[Verse 1]
Original lyrics here
[Chorus]
Modified lyrics for this section
[Verse 2]
More original lyrics",
    "callBackUrl": "https://example.com/callback"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    taskId: '2fac****9f72',
    audioId: 'e231****-****-****-****-****8cadc7dc',
    prompt: 'A calm and relaxing piano track.',
    tags: 'Jazz',
    title: 'Relaxing Piano',
    negativeTags: 'Rock',
    infillStartS: 10.5,
    infillEndS: 20.75,
    fullLyrics: '[Verse 1]\nOriginal lyrics here\n[Chorus]\nModified lyrics for this section\n[Verse 2]\nMore original lyrics',
    callBackUrl: 'https://example.com/callback'
  })
};

fetch('https://api.sunoapi.org/api/v1/generate/replace-section', 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.sunoapi.org/api/v1/generate/replace-section",
  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([
    'taskId' => '2fac****9f72',
    'audioId' => 'e231****-****-****-****-****8cadc7dc',
    'prompt' => 'A calm and relaxing piano track.',
    'tags' => 'Jazz',
    'title' => 'Relaxing Piano',
    'negativeTags' => 'Rock',
    'infillStartS' => 10.5,
    'infillEndS' => 20.75,
    'fullLyrics' => '[Verse 1]
Original lyrics here
[Chorus]
Modified lyrics for this section
[Verse 2]
More original lyrics',
    'callBackUrl' => 'https://example.com/callback'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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.sunoapi.org/api/v1/generate/replace-section"

	payload := strings.NewReader("{\n  \"taskId\": \"2fac****9f72\",\n  \"audioId\": \"e231****-****-****-****-****8cadc7dc\",\n  \"prompt\": \"A calm and relaxing piano track.\",\n  \"tags\": \"Jazz\",\n  \"title\": \"Relaxing Piano\",\n  \"negativeTags\": \"Rock\",\n  \"infillStartS\": 10.5,\n  \"infillEndS\": 20.75,\n  \"fullLyrics\": \"[Verse 1]\\nOriginal lyrics here\\n[Chorus]\\nModified lyrics for this section\\n[Verse 2]\\nMore original lyrics\",\n  \"callBackUrl\": \"https://example.com/callback\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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.sunoapi.org/api/v1/generate/replace-section")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"taskId\": \"2fac****9f72\",\n  \"audioId\": \"e231****-****-****-****-****8cadc7dc\",\n  \"prompt\": \"A calm and relaxing piano track.\",\n  \"tags\": \"Jazz\",\n  \"title\": \"Relaxing Piano\",\n  \"negativeTags\": \"Rock\",\n  \"infillStartS\": 10.5,\n  \"infillEndS\": 20.75,\n  \"fullLyrics\": \"[Verse 1]\\nOriginal lyrics here\\n[Chorus]\\nModified lyrics for this section\\n[Verse 2]\\nMore original lyrics\",\n  \"callBackUrl\": \"https://example.com/callback\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sunoapi.org/api/v1/generate/replace-section")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"taskId\": \"2fac****9f72\",\n  \"audioId\": \"e231****-****-****-****-****8cadc7dc\",\n  \"prompt\": \"A calm and relaxing piano track.\",\n  \"tags\": \"Jazz\",\n  \"title\": \"Relaxing Piano\",\n  \"negativeTags\": \"Rock\",\n  \"infillStartS\": 10.5,\n  \"infillEndS\": 20.75,\n  \"fullLyrics\": \"[Verse 1]\\nOriginal lyrics here\\n[Chorus]\\nModified lyrics for this section\\n[Verse 2]\\nMore original lyrics\",\n  \"callBackUrl\": \"https://example.com/callback\"\n}"

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

{
  "msg": "success",
  "data": {
    "taskId": "5c79****be8e"
  }
}

{
  "code": 500,
  "msg": "Server Error - An unexpected error occurred while processing the request",
  "data": null
}