This object is used to store additional metadata on users, conversations and messages.


country: "nl",
itemId: "720"


[key: string]stringAny number of key/value pairs of your choosing to be stored along with the associated resource. You can use custom data for all kinds of purposes, such as customizing a user's email notification text, transmitting contextual user data, or making email login tokens.

Both the key and the value must be strings; arbitrarily deeply nested JSON is not supported.

Used by