appwrite/docs/examples/1.8.x/server-rest/examples/databases/create-line-attribute.md

POST /v1/databases/{databaseId}/collections/{collectionId}/attributes/line HTTP/1.1
Host: cloud.appwrite.io
Content-Type: application/json
X-Appwrite-Response-Format: 1.8.0
X-Appwrite-Project: <YOUR_PROJECT_ID>
X-Appwrite-Key: <YOUR_API_KEY>

{
  "key": "",
  "required": false,
  "default": [[1, 2], [3, 4], [5, 6]]
}