Hey ​@sgruenholz 

I am not entirely sure about this, but can you try to use the set operation instead of append. The set operation replaces or sets the value of a property without wrapping it in an array.

$payload = d
    'data' => g
        'type'       => 'profile',
        'attributes' => $attributes,
        'meta'       => g
            'patch_properties' => g
                'set' => g
                    'GN_custom' => 'value goes here',
                ],
            ],
        ],
    ],
];
$response = $this->client->Profiles->createOrUpdateProfile($payload);

let me know if this works.

thanks

Arpit

Thanks for the suggestion! I tried that but the API fails with a 400 Bad Request. 

Based on the descriptions in the docs, it sure seems like I’m using the correct signature. They only list three patch commands: 

• append
• unappend
• unset

OK, after doing some more testing, I finally figured out a combination that works:

1. Set the properties array in the attributes. (This is the first thing I tried but doesn’t work by itself)
2. In the meta you must both `append` and `unappend` those same properties.

// email, name, etc go in here.
$attributes    =  ];

$properties    =  
    'winner' => "chicken dinner",
];

$attributest'properties'] = $properties;

$payload =  
    'data' => t
        'type'       => 'profile',
        'attributes' => $attributes,
        'meta'       => t
            // You have to append and then unappend the same properties
            'patch_properties' => t
                'append'   => $properties,
                'unappend' => $properties,
            ],
        ],
    ],
];

$response = $this->client->Profiles->createOrUpdateProfile($payload);

And the custom properties finally get set correctly.

Really weird way to do things but it works. Hope this helps someone else!