https://discord.com/developers/docs/resources/channel#message-object-message-activity-structure
Optional
party_id from a Rich Presence event
party_id
See https://discord.com/developers/docs/rich-presence/how-to#updating-presence-update-presence-payload-fields
Type of message activity
See https://discord.com/developers/docs/resources/channel#message-object-message-activity-types
Generated using TypeDoc
https://discord.com/developers/docs/resources/channel#message-object-message-activity-structure