curl --request DELETE \
  --url https://api.serial.io/work-orders/{id}/approvals/{approver_user_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "requested_by_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}'

{
  "id": "<string>",
  "wo_number": 1,
  "name": "<string>",
  "description": "<string>",
  "component_id": "<string>",
  "part_number_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "created_at": "2023-11-07T05:31:56Z",
  "created_by_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "status": "DRAFT",
  "phase": "<string>",
  "quantity": 123,
  "approvals": {
    "[approver_user_id]": {
      "approver_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "requested_by_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "requested_at": "2023-11-07T05:31:56Z",
      "status": "<any>",
      "last_updated_at": "2023-11-07T05:31:56Z"
    }
  },
  "assignee_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "deadline": "2023-11-07T05:31:56Z",
  "activity_log": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "message": "<string>",
      "added_at": "2023-11-07T05:31:56Z",
      "added_by_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "type": "CREATED",
      "data": "<string>"
    }
  ],
  "last_edited_at": "2023-11-07T05:31:56Z",
  "attachments": [
    {
      "dataset_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "value": "<string>",
      "file_name": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "added_at": "2023-11-07T05:31:56Z",
      "added_by_user_id": "<string>",
      "is_deleted": true
    }
  ]
}