curl --request PATCH \
  --url https://api.mottostreaming.com/monetization/ads/v1/sponsorship_collections/{sponsorship_collection_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "sponsorship_collection_id": "<string>",
  "project_id": "<string>",
  "update_mask": "<string>"
}
'

{
  "sponsorship_collection": {
    "id": "<string>",
    "project_id": "<string>",
    "name": "<string>",
    "slots": [
      {
        "asset_id": {},
        "destination_url": {}
      }
    ]
  }
}