post
https://e-{networkId}.adzerk.net/udb/{networkId}/custom
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.
