gistfile1.php

// Let's add a new Email record
$parameters = array(
    'session' => $sessionId,
    'module' => 'Emails',
    'name_value_list' => array(
        array('name' => 'name', 'value' => 'email body'),
        array('name' => 'from_addr', 'value' => 'tboland+from@gmail.com'),
        array('name' => 'to_addrs', 'value' => 'tboland+from@gmail.com'),
        array('name' => 'date_sent', 'value' => gmdate("Y-m-d H:i:s")),
        array('name' => 'description', 'value' => 'This is an email created from a REST web services call'),
        array('name' => 'description_html', 'value' => '<p>This is an email created from a REST web services call</p>'),
        array('name' => 'parent_type', 'value' => '<<RelatedModuleName>>'),
        array('name' => 'parent_id', 'value' => '<<RelatedModuleRecordId>>'),
        ),
    );
$json = json_encode($parameters);
$postArgs = array(
    'method' => 'set_entry',
    'input_type' => 'JSON',
    'response_type' => 'JSON',
    'rest_data' => $json,
    );
curl_setopt($curl, CURLOPT_POSTFIELDS, $postArgs);

// Make the REST call, returning the result
$response = curl_exec($curl);

// Convert the result from JSON format to a PHP array
$result = json_decode($response);
if ( !is_object($result) ) {
   var_dump($result);
   die("Error handling result set_entry Emails.\n");
}
if ( !isset($result->id) ) {
    die("Error: {$result->name} - {$result->description}\n.");
}

// Get the newly created email id
$emailId = $result->id;