account | DynamicAccount | Yes | - | Select the DV360 advertiser that owns the channel. |
channel_id | string or SelectItem | Yes | - | ID of the channel whose sites to replace. |
sites | string or array of string | No | - | The complete new set of site URLs or app IDs, as a list or newline-separated text; all existing sites are replaced with exactly this set. Required unless clear_all is true. |
clear_all | boolean | No | False | When true, remove every site from the channel (replaces with an empty set). sites must be left empty. |