CloudEventDataFormat
Specifies the format that the data of a CloudEvent should be sent in
when using the JSON envelope format for a CloudEvent.
.
Binary = 0
Indicates the Data should be serialized as binary data.
This data will be included as a Base64 encoded string in the "data_base64"
field of the JSON payload.
Json = 1
Indicates the Data should be serialized as JSON.
The data will be included in the "data" field of the JSON payload.