Fires the entry event that initiates the journey. If you use UTF-8 characters in a payload for the Rest API, change the Content-Type header to: application/json; charset=UTF-8.
|ContactKey||string||Required||The ID that uniquely identifies a subscriber or a contact|
|EventDefinitionKey||string||Required||Find the EventDefinitionKey in Event Administration after the event is created and saved. The EventDefinitionKey is present for both standard and custom events. Don’t include a period in the EventDefinitionKey.|
|Data||object||Properties of the event. Only required if defined in a custom event or by the event.|