Get campaign

curl --request GET \
  --url https://api.wazapin.com/v1/campaigns/{campaignID} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "created_at": "<string>",
    "audience_source_type": "<string>",
    "id": "<string>",
    "name": "<string>",
    "organization_id": "<string>",
    "status": "<string>",
    "updated_at": "<string>",
    "canceled_at": "<string>",
    "completed_at": "<string>",
    "description": "<string>",
    "audience_source_id": "<string>",
    "explicit_contact_ids": [
      "<string>"
    ],
    "failed_at": "<string>",
    "metadata": "<unknown>",
    "scheduled_at": "<string>",
    "started_at": "<string>"
  }
}