OptionalappOptionalcontentOptionalcontentcontent type of body, eg. application/json
Optionalcorrelationfor RPC requests
Optionaldelivery1 for transient messages, 2 for persistent messages
OptionalexpirationMessage TTL, in milliseconds, as string
Optionalheaderscustom headers, can also be used for routing with header exchanges
OptionalmessageOptionalprioritybetween 0 and 255
Optionalreplyfor RPC requests
Optionaltimestampthe time the message was generated
OptionaltypeOptionaluser
content encoding of body, eg. gzip