Link Assets to Collection

curl --request POST \
  --url https://api.storytell.ai/v1/collections/{collectionID}/assets \
  --header 'Content-Type: application/json' \
  --data '{
  "assetIds": [
    [
      127
    ]
  ],
  "collectionId": [
    127
  ],
  "flags": [
    "<string>"
  ]
}'

{
  "code": "<string>",
  "data": [
    {
      "assetId": [
        127
      ],
      "collectionId": [
        127
      ],
      "joinId": [
        127
      ]
    }
  ],
  "details": {
    "consumption": {
      "units": 123
    },
    "operation": {
      "duration": 123,
      "operationId": "<string>"
    }
  },
  "done": true,
  "eventKey": "<string>",
  "message": "<string>"
}