here is my code

$sdk = new \NEM\SDK([
"protocol" => "http",
"use_ssl" => false,
"host" => "52.197.57.86",
"port" => 7890,
"endpoint" => "/",
]);

$message = $sdk->models()->Message(['type' => 1,'plain'=>'test123']);
$messageHash = $message->toDTO();

$keypair = new \NEM\Core\KeyPair("4444353a76a97fd65d67d0d0b5bae23069ca753d8a0793f01091e8051992d9b5","a01ca52e998f17804adfc193782a338b50a8f0476649dd4025fc3d2096cda5d9");

$data['transaction']['signer'] = $keypair->getPublicKey("hex");
$data['transaction']['amount'] = 3;
$data['transaction']['recipient'] = 'TAAM36DYU5GEUR6PBQG74TXCH63FDLF6Y2WXQOE3';
$data['transaction']['type'] = 257;
$data['transaction']['version'] = -1744830463;

$data['transaction']['message'] = $message;
$data['transaction']['message']['payload'] = $messageHash['payload'];
$data['transaction']['message']['type'] = $messageHash['type'];
$transactionM = $sdk->models()->Transaction($data);

$transaction = $service->announce($transactionM, $keypair);