curl --request GET \
  --url https://api.shingleai.com/v1/messages/{id}/contacts/{contactId} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z",
    "deletedAt": "2023-11-07T05:31:56Z",
    "organizationId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "messageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "contactId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "contactEmailId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "contactPhoneNumberId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "label": "<string>"
  },
  "meta": {
    "pagination": {
      "limit": 123,
      "offset": 123,
      "hasMore": true,
      "total": 123
    }
  }
}