创建发布 Flow

curl --request POST \
  --url https://aitoearn.cn/api/v2/channels/publish/flows \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "content": {
    "body": "test",
    "media": [
      {
        "url": "https://assets.aitoearn.cn/69a5882a0ae8abf6b443675f/user/media/202606/WZR5ZtF0t1lIQTx1_wW-_.mp4",
        "metadata": {
          "type": "video"
        }
      }
    ],
    "cover": {
      "url": "https://assets.aitoearn.cn/69a5882a0ae8abf6b443675f/user/media/202606/dS2sNtXUgrLfosukfpXwd.jpg",
      "metadata": {
        "type": "image"
      }
    },
    "title": "test title"
  },
  "publishAt": "2026-06-29T09:43:42Z",
  "items": {
    "accountId": "KWAI_f1b6d99b9252a17314bf5724e666123f",
    "platform": "KWAI",
    "overrides": {
      "body": "test",
      "media": [
        {
          "url": "https://assets.aitoearn.cn/69a5882a0ae8abf6b443675f/user/media/202606/WZR5ZtF0t1lIQTx1_wW-_.mp4",
          "metadata": {
            "type": "video"
          }
        }
      ],
      "cover": {
        "url": "https://assets.aitoearn.cn/69a5882a0ae8abf6b443675f/user/media/202606/dS2sNtXUgrLfosukfpXwd.jpg",
        "metadata": {
          "type": "image"
        }
      },
      "title": "test title"
    }
  }
}
'