JsonDataMessage

files attached to the incoming message

the text body of the incoming message.

if the incoming message has a shared contact, the contact's information will be here

the expiry timer on the incoming message. Clients should delete records of the message within this number of seconds

if the incoming message was sent to a v1 group, information about that group will be here

is the incoming message was sent to a v2 group, basic identifying information about that group will be here. For full information, use list_groups

list of mentions in the message

if the incoming message has a link preview, information about that preview will be here

if the incoming message is a quote or reply to another message, this will contain information about that message

if the message adds or removes a reaction to another message, this will indicate what change is being made

if the inbound message is deleting a previously sent message, indicates which message should be deleted

if the incoming message is a sticker, information about the sicker will be here

the timestamp that the message was sent at, according to the sender's device. This is used to uniquely identify this message for things like reactions and quotes.

indicates the message is a view once message. View once messages typically include no body and a single image attachment. Official Signal clients will prevent the user from saving the image, and once the user has viewed the image once they will destroy the image.