# Events, Messages, Queues

Events are passed within Contextual in 3 ways:

* Send To Agent Nodes - These are nodes within your Contextual flow that will send the message payload (msg.payload) along to another Agent.
* Triggers - These are configured on Object Types and pass a new (post insert), updated (post-update) or deleted (post-delete) record along to the designated Agent for processing.
* Actions - These can be manually run or triggered via API. To run an Action manually you configure the Action on the Object Type and then execute it in the overflow menu for the record itself.

Note that the format of a Trigger payload for a Record is slightly different than that for an Action. On a Trigger the record be passed as an event as msg.payload. On an Action it will be under an instance property, so msg.event.instance.


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