API Validation Errors

If the requested create, update, or delete cannot be performed due to validation errors, the server returns a 422 Unprocessable Entity response with an array of the validation errors:

Status: 422 Unprocessable Entity
Content-Type: application/xml; charset=utf-8

<?xml version="1.0" encoding="UTF-8"?>
<errors>
  <error field="model_name.field_name" symbol="not_a_number" lang="en-US">is not a number</error>
</errors>