let clientId: Int32 = td_create_client_id()

let request = ["@type": "getTextEntities", "text": "@telegram /test_command https://telegram.org telegram.me", "@extra": ["5", 7.0, "\\u00e4"]] as [String: Any]

func dictToJSONString(_ dictionary: [String: Any]) -> String {
    let dictionaryData = try! JSONSerialization.data(withJSONObject: dictionary)
    return String(data: dictionaryData, encoding: .utf8)!
}

func JSONStringToDict(_ string: String) -> [String: Any] {
    let responseData = string.data(using: .utf8)!
    return try! JSONSerialization.jsonObject(with: responseData, options: .allowFragments) as! [String: Any]
}

if let res = td_execute(dictToJSONString(request)) {
    let responseString = String(cString: res)
    let responseDict = JSONStringToDict(responseString)
    print("Response from TDLib \(responseDict)")
}

let request = [
    "@type": "setTdlibParameters",
    "api_hash": "5e6d7b36f0e363cf0c07baf2deb26076",
    "api_id": 287311,
    "application_version": "1.0",
    "database_directory": "tdlib",
    "database_encryption_key": nil,
    "device_model": "iOS",
    "enable_storage_optimizer": true,
    "files_directory": "",
    "ignore_file_names": true,
    "system_language_code": "en",
    "system_version": "Unknown",
    "use_chat_info_database": true,
    "use_file_database": true,
    "use_message_database": true,
    "use_secret_chats": true,
    "use_test_dc": false,
] as [String: Any]
// Send request
td_send(clientId, dictToJSONString(request))

// Block thread and wait for response (not more 5.0 seconds)
if let response = td_receive(5.0) {
   let responseString = String(cString: res)
   let responseDict = JSONStringToDict(responseString)
   print("Async response from TDLib \(responseDict)")
}

td_send(clientId, dictToJSONString(["@type": "Close"] as [String: String]))