post https://{your-bynder-domain}/api/v4/media/save/
For metaproperties that use options (Select, Select2, Autocomplete), modifying an asset's metaproperty options should be done via option UUID's for the API to work optimally, sending name or label values will be deprecated in the future. Other metaproperties (Date, Text and Longtext), values can be submitted directly.