put https://api.voucherify.io/v1/promotions//stacks/
This methods allows for editing an existing stack.
Response schema
Returns a list if a valid promotion campaign identifier was provided in the path.
id An internal id corresponding to the stack id.
name Contains the name of the stack.
updated_at Returns the timestamp when the promotion stack was updated.
tiers An object containing the ids of the stacked promotion tiers.
Returns an error if an incorrect campaign id, stack id or promotion tier id is provided.