setDefaultValues

PUT /rest/api/3/field/{fieldId}/context/defaultValue HTTP/1.1

{
  "fieldId": {
    "description": "The ID of the custom field.",
    "required": true,
    "location": "path",
    "type": "string"
  },
  "defaultValues": {
    "description": "",
    "required": false,
    "location": "body",
    "type": "array"
  }
}

{}