curl -i -X POST "https://api.box.com/2.0/folders/4353455/metadata/enterprise_27335/blueprintTemplate" \
     -H "authorization: Bearer <ACCESS_TOKEN>" \
     -H "content-type: application/json" \
     -d '{
       "audience": "internal",
       "documentType": "Q1 plans",
       "competitiveDocument": "no",
       "status": "active",
       "author": "Jones",
       "currentState": "proposal"
     }'

await client.folderMetadata.createFolderMetadataById(
  folder.id,
  'enterprise' as CreateFolderMetadataByIdScope,
  templateKey,
  {
    ['name']: 'John',
    ['age']: 23,
    ['birthDate']: '2001-01-03T02:20:50.520Z',
    ['countryCode']: 'US',
    ['sports']: ['basketball', 'tennis'],
  },
);

client.folder_metadata.create_folder_metadata_by_id(
    folder.id,
    CreateFolderMetadataByIdScope.ENTERPRISE.value,
    template_key,
    {
        "name": "John",
        "age": 23,
        "birthDate": "2001-01-03T02:20:50.520Z",
        "countryCode": "US",
        "sports": ["basketball", "tennis"],
    },
)

await client.FolderMetadata.CreateFolderMetadataByIdAsync(folderId: folder.Id, scope: CreateFolderMetadataByIdScope.Enterprise, templateKey: templateKey, requestBody: new Dictionary<string, object>() { { "name", "John" }, { "age", 23 }, { "birthDate", "2001-01-03T02:20:50.520Z" }, { "countryCode", "US" }, { "sports", Array.AsReadOnly(new [] {"basketball","tennis"}) } });

try await client.folderMetadata.createFolderMetadataById(folderId: folder.id, scope: CreateFolderMetadataByIdScope.global, templateKey: "properties", requestBody: ["abc": "xyz"])

BoxFolder folder = new BoxFolder(api, "id");
folder.createMetadata(new Metadata().add("/foo", "bar"));

metadata = {
    'foo': 'bar',
    'baz': 'quux',
}

applied_metadata = client.folder(folder_id='22222').metadata().create(metadata)
print(f'Applied metadata in instance ID {applied_metadata["$id"]}')

var metadataValues = new Dictionary<string, object>()
{
    { "audience", "internal" },
    { "documentType", "Q1 plans" },
    { "competitiveDocument", "no" },
    { "status", "active" },
    { "author": "M. Jones" },
    { "currentState": "proposal" }
};
Dictionary<string, object> metadata = await client.MetadataManager
    .CreateFolderMetadataAsync(folderId: "11111", metadataValues, "enterprise", "marketingCollateral");

var metadataValues = {
	audience: "internal",
	documentType: "Q1 plans",
	competitiveDocument: "no",
	status: "active",
	author: "Jones",
	currentState: "proposal"
};
client.folders.addMetadata('11111', client.metadata.scopes.ENTERPRISE, "marketingCollateral", metadataValues)
	.then(metadata => {
		/* metadata -> {
			audience: 'internal',
			documentType: 'Q1 plans',
			competitiveDocument: 'no',
			status: 'active',
			author: 'Jones',
			currentState: 'proposal',
			'$type': 'marketingCollateral-d086c908-2498-4d3e-8a1f-01e82bfc2abe',
			'$parent': 'folder_11111',
			'$id': '2094c584-68e1-475c-a581-534a4609594e',
			'$version': 0,
			'$typeVersion': 0,
			'$template': 'marketingCollateral',
			'$scope': 'enterprise_12345' }
		*/
	});

let metadata = [
    "name": "John Doe",
    "birthday": "2000-01-01T00:00:00Z",
    "department": "Sales"
]
client.metadata.create(
    forFolderWithId: "22222",
    scope: "enterprise",
    templateKey: "personnelRecord",
    keys: metadata
) { (result: Result<MetadataObject, BoxSDKError>) in
    guard case let .success(metadata) = result {
        print("Error adding metadata")
        return
    }

    print("Successfully attached metadata")
}