curl --request PUT \
  --url https://restapi.sign.plus/v2/envelope/{envelope_id}/dynamic_fields \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "dynamic_fields": [
    {
      "name": "<string>",
      "value": "<string>"
    }
  ]
}
'

import requests

url = "https://restapi.sign.plus/v2/envelope/{envelope_id}/dynamic_fields"

payload = { "dynamic_fields": [
        {
            "name": "<string>",
            "value": "<string>"
        }
    ] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({dynamic_fields: [{name: '<string>', value: '<string>'}]})
};

fetch('https://restapi.sign.plus/v2/envelope/{envelope_id}/dynamic_fields', 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://restapi.sign.plus/v2/envelope/{envelope_id}/dynamic_fields",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'dynamic_fields' => [
        [
                'name' => '<string>',
                'value' => '<string>'
        ]
    ]
  ]),
  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://restapi.sign.plus/v2/envelope/{envelope_id}/dynamic_fields"

	payload := strings.NewReader("{\n  \"dynamic_fields\": [\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("PUT", 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.put("https://restapi.sign.plus/v2/envelope/{envelope_id}/dynamic_fields")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"dynamic_fields\": [\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://restapi.sign.plus/v2/envelope/{envelope_id}/dynamic_fields")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"dynamic_fields\": [\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}"

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

{
  "id": "<string>",
  "name": "<string>",
  "comment": "<string>",
  "pages": 123,
  "created_at": 123,
  "updated_at": 123,
  "expires_at": 123,
  "num_recipients": 123,
  "is_duplicable": true,
  "signing_steps": [
    {
      "recipients": [
        {
          "name": "<string>",
          "email": "<string>",
          "id": "<string>",
          "uid": "<string>",
          "verification": {
            "value": "<string>"
          }
        }
      ]
    }
  ],
  "documents": [
    {
      "id": "<string>",
      "name": "<string>",
      "filename": "<string>",
      "page_count": 123,
      "pages": [
        {
          "width": 123,
          "height": 123
        }
      ]
    }
  ],
  "notification": {
    "subject": "<string>",
    "message": "<string>",
    "reminder_interval": 123
  },
  "attachments": {
    "settings": {
      "visible_to_recipients": true
    },
    "recipients": [
      {
        "recipient_id": "<string>",
        "recipient_name": "<string>",
        "placeholders": [
          {
            "recipient_id": "<string>",
            "id": "<string>",
            "name": "<string>",
            "hint": "<string>",
            "required": true,
            "multiple": true,
            "files": [
              {
                "id": "<string>",
                "name": "<string>",
                "size": 123,
                "mimetype": "<string>"
              }
            ]
          }
        ]
      }
    ]
  }
}