CollectionsWithAccountPreviews

{
  "collections": [
    {
      "id": "116131056935959117",
      "account_id": "113668893442515793",
      "uri": "https://example.com/ap/113668893442515793/collections/116131056935959117",
      "url": "https://example.com/collections/116131056935959117",
      "name": "Excellent people",
      // ... full Collection entity
    },
    {
      "id": "116131351935851219",
      "account_id": "114182813422535512",
      "uri": "https://example.com/ap/114182813422535512/collections/116131351935851219",
      "url": "https://example.com/collections/116131351935851219",
      "name": "Film photographers",
      // ... full Collection entity
    }
  ],
  "partial_accounts": [
    {
      "id": "113668893442515793",
      // ... `PartialAccountWithAvatar` entity for the owner of the first collection
    },
    {
      "id": "114182813422535512",
      // ... `PartialAccountWithAvatar` entity for the owner of the second collection
    },
    {
      "id": "112658193342215767",
      // ... `PartialAccountWithAvatar` entity for the first item in the first collection
    },
    // ...
  ],
}