How to request eSignature via SMS (Text Messages) using BoldSign API?

curl -X 'POST' \
  'https://api.boldsign.com/v1/document/send' \
  -H 'accept: application/json' \
  -H 'X-API-KEY: {Your API key}' \
  -H 'Content-Type: multipart/form-data' \
  -F 'Message=Please sign this' \
  -F 'Signers={
  "name": "David",
  "deliveryMode":"SMS",
  "phoneNumber": {
    "countryCode": "{signer country code}",
    "number": "{signer phone number}"
  },
  "signerType": "Signer",
  "signerRole": "Signer",
"formFields": [
   {
     "id": "signer",
     "fieldType": "Signature",
     "pageNumber": 1,
     "bounds": {
       "x": 50,
       "y": 100,
       "width": 100,
       "height": 60
     },
     "isRequired": true
   }
 ]
}' \
  -F 'Files=@{your file path}' \

var apiClient = new ApiClient("https://api.boldsign.com", "{Your API key}");
var documentClient = new DocumentClient(apiClient);

var documentFilePath = new DocumentFilePath
{
    ContentType = "application/pdf",
    FilePath = "{Your File path}"
};

var filesToUpload = new List<IDocumentFile>
{
    documentFilePath,
};

 var signatureField = new FormField(
                        id: "signature",
                        isRequired: true,
                        type: FieldType.Signature,
                        pageNumber: 1,
                        bounds: new BoldSign.Model.Rectangle(x: 100, y: 100, width: 125, height: 25));

var formFieldCollections = new List<FormField>()
{
    signatureField
};

        var signer = new DocumentSigner(
            signerName: "David",
            phoneNumber: new PhoneNumber(
            countryCode: "{signer country code}",
            number: "{signer phone number}"),
            formFields: formFieldCollections,
            locale: Locales.EN);

        signer.DeliveryMode = DeliveryMode.SMS;

        var documentSigners = new List<DocumentSigner>()
{
    signer
};

        var sendForSign = new SendForSign()
        {
            Signers = documentSigners,
            Title = "Sample Document",
            Message="Please sign this",
            Files = filesToUpload
        };

        var documentCreated = documentClient.SendDocument(sendForSign);
        Console.WriteLine(documentCreated.DocumentId.ToString());

import requests
import json

url="https://api.boldsign.com/v1/document/send"
signer_data = {
    "name": "David",
    "phoneNumber": {
        "countryCode": "{signer country code}",
        "number": "{signer phone number}"
    },
    "signerType": "Signer",
    "deliveryMode": "SMS",
    "signerRole": "Signer",
    "formFields": [
    {
     "id": "Signature",
      "type": "FieldType.Signature", 
      "pageNumber": 1,
      "bounds": {
        "x": 100,
        "y": 100,
        "width": 200,
        "height": 100
      },
      "isRequired": True,
    }
    ],
    "locale": "EN"
}
headers = {
     'accept': 'application/json',
     'X-API-KEY': '{your API key}'
 }
payload = {
  
    'Signers': json.dumps(signer_data),
    'Title': "Sample Document",
    'Message': "Please sign this"
}

files = [
    ('Files', ('{your file name}', open('your file path', 'rb'), 'application/pdf'))
]
response = requests.post(url, headers=headers, data=payload, files=files)
print(response.text)

const axios = require('axios');
const FormData = require('form-data');
const fs = require('fs');
 
const form = new FormData();

form.append('Message', 'Please sign this.');
form.append('Signers', '{\n  "name": "David",\n "deliveryMode":"SMS",\n "phoneNumber":{"countryCode":"{signer country code}","number":"{signer phone number}"},\n  "formFields": [\n    {\n      "fieldType": "Signature",\n      "pageNumber": 1,\n      "bounds": {\n        "x": 100,\n        "y": 100,\n        "width": 100,\n        "height": 50\n      },\n      "isRequired": true\n    }\n  ]\n}');
form.append('Files', fs.createReadStream('{your file path}'));
form.append('Title', 'Sample document');
 
let config = {
    method: 'post',
    maxBodyLength: Infinity,
    url: 'https://api.boldsign.com/v1/document/send',
    headers: {
      'accept': 'application/json',
      'X-API-KEY': '{Your API key}',
      ...form.getHeaders()
    },
    data : form
  };
   
  axios.request(config)
  .then((response) => {
    console.log(JSON.stringify(response.data));
  })
  .catch((error) => {
    console.log(error);
  });