curl --request POST \
  --url https://api.thehaystack.ai/v2/haystack/items/{itemId}/artwork/upload \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form type=square \
  --form image='@example-file'

{
  "item": {
    "id": 123,
    "title": "The Power of Prayer",
    "subTitle": "<string>",
    "description": "<string>",
    "shortDescription": "<string>",
    "date": "2025-01-15",
    "collectionId": 123,
    "seriesId": 123,
    "orderInSeries": 123,
    "urlSlug": "<string>",
    "durationSecs": 123,
    "status": "draft",
    "wizardStep": "basicDetails",
    "publishedDate": "2023-11-07T05:31:56Z",
    "autoPublish": true,
    "squareImgUrl": "<string>",
    "wideImgUrl": "<string>",
    "ultraWideImgUrl": "<string>",
    "verticalImgUrl": "<string>",
    "entryDate": "2023-11-07T05:31:56Z",
    "collection": {
      "id": 1,
      "name": "Sunday Sermons",
      "itemDescriptor": "sermon",
      "contentFormat": "sermon",
      "fullService": false,
      "variantTypes": [
        {
          "id": 123,
          "name": "Sermon Video",
          "contentType": "video",
          "indexable": true,
          "displayOrder": 123,
          "collectionId": 123
        }
      ]
    },
    "series": {
      "id": 123,
      "title": "The Gospel of John",
      "subTitle": "<string>",
      "collectionId": 123,
      "description": "<string>",
      "shortDescription": "<string>",
      "sortOrder": 123,
      "itemSortDirection": "DESC",
      "showItemOrderInSeries": true,
      "urlSlug": "<string>",
      "colorHex": "#FF5733",
      "squareImgUrl": "<string>",
      "wideImgUrl": "<string>",
      "ultraWideImgUrl": "<string>",
      "published": true,
      "verticalImgUrl": "<string>",
      "squareImgMetadata": {},
      "wideImgMetadata": {},
      "ultraWideImgMetadata": {},
      "verticalImgMetadata": {},
      "items": "<array>",
      "collection": {
        "id": 1,
        "name": "Sunday Sermons",
        "itemDescriptor": "sermon",
        "contentFormat": "sermon",
        "fullService": false,
        "variantTypes": [
          {
            "id": 123,
            "name": "Sermon Video",
            "contentType": "video",
            "indexable": true,
            "displayOrder": 123,
            "collectionId": 123
          }
        ]
      }
    },
    "speakers": [
      {
        "id": 123,
        "name": "Pastor John Smith",
        "bio": "<string>",
        "imageUrl": "<string>",
        "imageFilename": "<string>",
        "itemCount": 123
      }
    ],
    "scriptures": [
      {
        "id": 123,
        "itemId": 123,
        "book": "<string>",
        "bookName": "Matthew",
        "chapter": 123,
        "verseStart": 123,
        "verseEnd": 123,
        "keyVerse": true,
        "suggested": true,
        "accepted": true,
        "displayOrder": 123,
        "citation": "Matthew 5:1-12",
        "hidden": true
      }
    ],
    "mediaAssets": [
      {
        "id": 123,
        "itemId": 123,
        "item": "<unknown>",
        "contentType": "audio",
        "mimeType": "<string>",
        "variantTypeId": 123,
        "variantType": {
          "id": 123,
          "name": "Sermon Video",
          "contentType": "video",
          "indexable": true,
          "displayOrder": 123,
          "collectionId": 123
        },
        "fileSizeBytes": 123,
        "durationSecs": 123,
        "bitrate": 123,
        "videoWidth": 123,
        "videoHeight": 123,
        "filename": "<string>",
        "originalFilename": "<string>",
        "externalPlatform": "youtube",
        "externalPlatformId": "<string>",
        "muxAssetId": "<string>",
        "muxPlaybackId": "<string>",
        "status": "created",
        "url": "<string>",
        "downloadUrl": "<string>",
        "chapters": [
          {
            "id": 123,
            "itemId": 123,
            "mediaAssetId": 123,
            "title": "Introduction",
            "startMs": 123,
            "suggested": true,
            "accepted": true,
            "hidden": true
          }
        ],
        "entryDate": "2023-11-07T05:31:56Z"
      }
    ],
    "resources": [
      {
        "id": 123,
        "itemId": 123,
        "title": "<string>",
        "subTitle": "<string>",
        "description": "<string>",
        "resourceTypeId": 123,
        "displayOrder": 123,
        "contentType": "file",
        "fileMimeType": "<string>",
        "fileSizeBytes": 123,
        "externalPlatform": "youtube",
        "externalPlatformId": "<string>",
        "thumbnailImgUrl": "<string>",
        "url": "<string>",
        "resourceType": {
          "id": 123,
          "name": "<string>"
        },
        "linkTarget": "<string>"
      }
    ],
    "suggestedDescription": "<string>",
    "suggestedShortDescription": "<string>",
    "errorMessage": "<string>",
    "indexedMediaAssetId": 123,
    "autoAcceptScriptures": true,
    "autoAcceptMediaChapters": true,
    "transcriptUrl": "<string>",
    "topics": [
      {
        "id": 123,
        "name": "<string>",
        "itemCount": 123
      }
    ],
    "squareImgMetadata": {},
    "wideImgMetadata": {},
    "ultraWideImgMetadata": {},
    "verticalImgMetadata": {}
  }
}