curl --request POST \
  --url https://api.thehaystack.ai/v2/haystack/media/create \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "itemId": 123,
  "variantTypeId": 123,
  "mimeType": "video/mp4",
  "originalFilename": "<string>",
  "externalPlatformId": "dQw4w9WgXcQ"
}
'

{
  "mediaAsset": {
    "id": 123,
    "itemId": 123,
    "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,
      "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",
        "fullService": false,
        "variantTypes": [
          {
            "id": 123,
            "name": "Sermon 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",
          "fullService": false,
          "variantTypes": [
            {
              "id": 123,
              "name": "Sermon 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": "<array>",
      "resources": [
        {
          "id": 123,
          "itemId": 123,
          "title": "<string>",
          "subTitle": "<string>",
          "description": "<string>",
          "resourceTypeId": 123,
          "displayOrder": 123,
          "fileMimeType": "<string>",
          "fileSizeBytes": 123,
          "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": {}
    },
    "mimeType": "<string>",
    "variantTypeId": 123,
    "variantType": {
      "id": 123,
      "name": "Sermon Video",
      "indexable": true,
      "displayOrder": 123,
      "collectionId": 123
    },
    "fileSizeBytes": 123,
    "durationSecs": 123,
    "bitrate": 123,
    "videoWidth": 123,
    "videoHeight": 123,
    "filename": "<string>",
    "originalFilename": "<string>",
    "externalPlatformId": "<string>",
    "muxAssetId": "<string>",
    "muxPlaybackId": "<string>",
    "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"
  },
  "uploadUrl": "https://storage.example.com/upload/abc123?signature=xyz"
}