Check-Contact

{
  "type": "object",
  "required": [
    "contacts"
  ],
  "properties": {
    "blocking": {
      "type": "string",
      "description": "Blocking determines whether the request should wait for the processing to complete (synchronous) or not (asynchronous).",
      "enum": [
        "no_wait",
        "wait"
      ]
    },
    "contacts": {
      "type": "array",
      "description": "Array of contact phone numbers. The numbers can be in any standard telephone number format.",
      "items": {
        "type": "string"
      }
    }
  }
}