'sc' => (object)['@id' => 'http://schema.org#', '@type' => '@id'],
'pt' => (object)['@id' => 'https://joinpeertube.org/ns#', '@type' => '@id'],
'mobilizon' => (object)['@id' => 'https://joinmobilizon.org/ns#', '@type' => '@id'],
+ 'fedibird' => (object)['@id' => 'http://fedibird.com/ns#', '@type' => '@id'],
+ 'misskey' => (object)['@id' => 'https://misskey-hub.net/ns#', '@type' => '@id'],
];
$orig_json = $json;