curl -i -X POST "https://api.box.com/2.0/sign_requests" \
     -H "Authorization: Bearer <ACCESS_TOKEN>" \
     -d '{
       "signers": [
          {    
            "role": "signer",
            "email": "example_email@box.com"
          }
        ],
       "source_files": [
          {
            "type": "file",
            "id": "123456789"
          }
       ],
       "parent_folder": 
          {
            "type": "folder",
            "id": "0987654321"
          }
     }'

var sourceFiles = new List<BoxSignRequestCreateSourceFile>
{
    new BoxSignRequestCreateSourceFile()
    {
        Id = "12345"
    }
};

var signers = new List<BoxSignRequestSignerCreate>
{
    new BoxSignRequestSignerCreate()
    {
        Email = "example@gmail.com"
    }
};

var parentFolder = new BoxRequestEntity()
{
    Id = "12345",
    Type = BoxType.folder
};

var request = new BoxSignRequestCreateRequest
{
    SourceFiles = sourceFiles,
    Signers = signers,
    ParentFolder = parentFolder
};

BoxSignRequest signRequest = await client.SignRequestsManager.CreateSignRequestAsync(request);

List<BoxSignRequestFile> files = new ArrayList<BoxSignRequestFile>();
        BoxSignRequestFile file = new BoxSignRequestFile("12345");
        files.add(file);
        
// you can also use specific version of the file
BoxFile file = new BoxFile(api, "12345");
List<BoxFileVersion> versions = file.getVersions();
BoxFileVersion firstVersion = versions.get(0);
BoxSignRequestFile file = new BoxSignRequestFile(firstVersion.getFileID(), firstVersion.getVersionID());

List<BoxSignRequestSigner> signers = new ArrayList<BoxSignRequestSigner>();
BoxSignRequestSigner newSigner = new BoxSignRequestSigner("signer@mail.com");
signers.add(newSigner);

String destinationParentFolderId = "55555";

BoxSignRequest.Info signRequestInfo = BoxSignRequest.createSignRequest(api, files,
        signers, destinationParentFolderId);

source_file = {
    'id': '12345',
    'type': 'file'
}
files = [source_file]

signer = {
    'name': 'John Doe',
    'email': 'signer@mail.com' 
}
signers = [signer]

parent_folder_id = '123456789'
new_sign_request = client.create_sign_request(files, signers, parent_folder_id)
print(f'(Sign Request ID: {new_sign_request.id})')

const signRequest = await client.signRequests.create({
	signers: [
		{
			role: 'signer',
			email: 'user@example.com',
		},
	],
	source_files: [
		{
			type: 'file',
			id: '12345',
		},
	],
	parent_folder: {
		type: 'folder',
		id: '1234567',
	},
});
console.log(`Created a new sign request id ${signRequest.id}`);

let signers = [SignRequestCreateSigner(email: "signer@mail.com", role: .approver)]
let sourceFiles = [SignRequestCreateSourceFile(id: "12345")]
let parentFolder = SignRequestCreateParentFolder(id: "234")

client.signRequests.create(signers: signers, sourceFiles: sourceFiles, parentFolder: parentFolder) { (result: Result<SignRequest, BoxSDKError>) in
    guard case let .success(signRequest) = result else {
        print("Error creating sign request")
        return
    }

    print("Sign request \(signRequest.id) was created")
}