Retrieve a site's service charge settings

Example response

{
  "data": {
    "default_percentage": 10,
    "exit_gratuity_offering_defaults": [
      {
        "tip_wording": "Add a gratuity for your therapist",
        "offerings": [
          {
            "offering_name": "Twilight massage",
            "offering_type": "appointment"
          }
        ]
      }
    ],
    "offering_defaults": [
      {
        "percentage": 12.5,
        "offerings": [
          {
            "offering_name": "Twilight massage",
            "offering_type": "appointment"
          }
        ]
      }
    ],
    "tip_wording": "Add a gratuity for your therapist"
  }
}