Bulk add subscribers to forms Request

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/convertkit/main/json-schema/bulk_add_subscribers_to_forms_request.json",
  "title": "Bulk add subscribers to forms Request",
  "x-tag": "Forms",
  "type": "object",
  "properties": {
    "additions": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "form_id": {
            "type": "integer",
            "nullable": true
          },
          "subscriber_id": {
            "type": "integer",
            "nullable": true
          },
          "referrer": {
            "type": "string"
          }
        },
        "required": [
          "form_id",
          "subscriber_id"
        ]
      }
    },
    "callback_url": {
      "type": "string",
      "nullable": true
    }
  },
  "required": [
    "additions"
  ]
}