curl --request POST \
  --url https://mainnet.gomaestro-api.org/v1/contracts/singleAssetStaking/updateStake \
  --header 'Content-Type: application/json' \
  --header 'api-key: <api-key>' \
  --data '
{
  "configTN": "<string>",
  "sender": "<string>",
  "toStake": 123,
  "nodeUTxOs": [
    {
      "txHash": "<string>",
      "outputIndex": 123,
      "address": "<string>",
      "assets": [
        {
          "policyId1assetName1": "123",
          "policyId2assetName2": "456",
          "policyId3assetName3": "789"
        }
      ],
      "datumHash": "<string>",
      "datum": "<string>",
      "scriptRef": "<string>"
    }
  ]
}
'

import requests

url = "https://mainnet.gomaestro-api.org/v1/contracts/singleAssetStaking/updateStake"

payload = {
    "configTN": "<string>",
    "sender": "<string>",
    "toStake": 123,
    "nodeUTxOs": [
        {
            "txHash": "<string>",
            "outputIndex": 123,
            "address": "<string>",
            "assets": [
                {
                    "policyId1assetName1": "123",
                    "policyId2assetName2": "456",
                    "policyId3assetName3": "789"
                }
            ],
            "datumHash": "<string>",
            "datum": "<string>",
            "scriptRef": "<string>"
        }
    ]
}
headers = {
    "api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    configTN: '<string>',
    sender: '<string>',
    toStake: 123,
    nodeUTxOs: [
      {
        txHash: '<string>',
        outputIndex: 123,
        address: '<string>',
        assets: [
          {
            policyId1assetName1: '123',
            policyId2assetName2: '456',
            policyId3assetName3: '789'
          }
        ],
        datumHash: '<string>',
        datum: '<string>',
        scriptRef: '<string>'
      }
    ]
  })
};

fetch('https://mainnet.gomaestro-api.org/v1/contracts/singleAssetStaking/updateStake', 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://mainnet.gomaestro-api.org/v1/contracts/singleAssetStaking/updateStake",
  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([
    'configTN' => '<string>',
    'sender' => '<string>',
    'toStake' => 123,
    'nodeUTxOs' => [
        [
                'txHash' => '<string>',
                'outputIndex' => 123,
                'address' => '<string>',
                'assets' => [
                                [
                                                                'policyId1assetName1' => '123',
                                                                'policyId2assetName2' => '456',
                                                                'policyId3assetName3' => '789'
                                ]
                ],
                'datumHash' => '<string>',
                'datum' => '<string>',
                'scriptRef' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "api-key: <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://mainnet.gomaestro-api.org/v1/contracts/singleAssetStaking/updateStake"

	payload := strings.NewReader("{\n  \"configTN\": \"<string>\",\n  \"sender\": \"<string>\",\n  \"toStake\": 123,\n  \"nodeUTxOs\": [\n    {\n      \"txHash\": \"<string>\",\n      \"outputIndex\": 123,\n      \"address\": \"<string>\",\n      \"assets\": [\n        {\n          \"policyId1assetName1\": \"123\",\n          \"policyId2assetName2\": \"456\",\n          \"policyId3assetName3\": \"789\"\n        }\n      ],\n      \"datumHash\": \"<string>\",\n      \"datum\": \"<string>\",\n      \"scriptRef\": \"<string>\"\n    }\n  ]\n}")

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

	req.Header.Add("api-key", "<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.post("https://mainnet.gomaestro-api.org/v1/contracts/singleAssetStaking/updateStake")
  .header("api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"configTN\": \"<string>\",\n  \"sender\": \"<string>\",\n  \"toStake\": 123,\n  \"nodeUTxOs\": [\n    {\n      \"txHash\": \"<string>\",\n      \"outputIndex\": 123,\n      \"address\": \"<string>\",\n      \"assets\": [\n        {\n          \"policyId1assetName1\": \"123\",\n          \"policyId2assetName2\": \"456\",\n          \"policyId3assetName3\": \"789\"\n        }\n      ],\n      \"datumHash\": \"<string>\",\n      \"datum\": \"<string>\",\n      \"scriptRef\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://mainnet.gomaestro-api.org/v1/contracts/singleAssetStaking/updateStake")

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

request = Net::HTTP::Post.new(url)
request["api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"configTN\": \"<string>\",\n  \"sender\": \"<string>\",\n  \"toStake\": 123,\n  \"nodeUTxOs\": [\n    {\n      \"txHash\": \"<string>\",\n      \"outputIndex\": 123,\n      \"address\": \"<string>\",\n      \"assets\": [\n        {\n          \"policyId1assetName1\": \"123\",\n          \"policyId2assetName2\": \"456\",\n          \"policyId3assetName3\": \"789\"\n        }\n      ],\n      \"datumHash\": \"<string>\",\n      \"datum\": \"<string>\",\n      \"scriptRef\": \"<string>\"\n    }\n  ]\n}"

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

{
  "cbor_hex": "<string>",
  "tx_hash": "<string>"
}