post https://e-{networkId}.adzerk.net/udb/{networkId}/custom
With this you can tie Custom Properties to a specific UserKey using key/value pairs. For instance, {"Key":"Value"} could be {"favoriteColor": "blue"}. Note that each call to set custom properties will replace any existing custom properties.
The max size of a custom data object in a UserDB record is 8 KB.
We recommend using either
camelCaseorsnake_casecustom property keys as these work well with Zerkel. Howeverkebab-caseshould be avoided. Also, symbol prefixes (like$,%,:, etc.) should not be used.
Note that the user key supplied in the
userobject will override a user key set via theazkcookie.