curl --request GET \
  --url https://api.autosend.com/v1/custom-fields \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "message": "Custom fields retrieved successfully",
  "data": {
    "customFields": [
      {
        "id": "69c258bae3e715c0521153fb",
        "fieldName": "isVerified",
        "fieldType": "boolean",
        "createdAt": "2026-03-24T09:26:18.826Z",
        "updatedAt": "2026-03-24T09:26:18.826Z"
      },
      {
        "id": "6960953e729f65f154369408",
        "fieldName": "company",
        "fieldType": "string",
        "createdAt": "2026-01-09T05:42:22.171Z",
        "updatedAt": "2026-01-09T05:42:22.171Z"
      },
      {
        "id": "69609535729f65f154369402",
        "fieldName": "industry",
        "fieldType": "string",
        "createdAt": "2026-01-09T05:42:13.892Z",
        "updatedAt": "2026-01-09T05:42:13.892Z"
      }
    ]
  }
}