body
Set the JSON request body for the most recently added webhook; the same as
params(). The platform reads a webhook’s request body from its
params field and has no body field, so this sets params, replacing any
params already set, and the request is sent as a POST.
Parameters
data
Request body object. Values can contain templates, which read the call data, so
arguments are ${args.name}.
Returns
DataMap — Self for method chaining. Throws an Error if no webhook
has been added yet.