Validate Event Batch

{
  "results": [
    {
      "data": {
        "validation_errors": [
          {
            "key": "event name or attribute name",
            "error_pointer": "#/data/custom_attributes/foo-attr-1",
            "expected": "null for unplanned entities, the entity name for missing required entities, a data type (e.g. \"number\") for invalid data types, etc",
            "actual": "the entity name for unplanned entities, null for missing required entities, a data type (e.g. \"string\") for invalid data types, etc"
          }
        ]
      }
    }
  ]
}