'limitation' can be either 'unlimited', 'limit_in_days' or 'limit_in_minutes'. For leave accrual limits, the limitation cannot be changed and the field can therefore be omitted.
For limits in days, the field 'max_yearly_amount_days' must be set.
For limits in minutes, the field 'max_yearly_amount_minutes' must be set.
For leave accrual limits, the field 'start_date' must be set.
Scope required: calendar:write