FieldUpsertRequest

date is an ISO 8601 string. datetime is a Unix timestamp. object holds arbitrary JSON — an object or an array — and round-trips as structure rather than as an escaped string; it is the type the builder canvas presents as array/list. An unrecognised type string is not rejected: the value is silently coerced and stored as string.

Field value. Type must match type.

Optional extra metadata. Pass {} if not used.