JCR DAM has fixed nodetypes for node storing binary data

<aggregate primaryType="mgnl:asset">
    <include primaryType="mgnl:resource">*</include>
</aggregate>

<?xml version="1.0" encoding="UTF-8"?>
<sv:node xmlns:sv="http://www.jcp.org/jcr/sv/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" sv:name="untitled">
   <sv:property sv:name="jcr:primaryType" sv:type="Name">
      <sv:value>mgnl:asset</sv:value>
   </sv:property>
   <sv:property sv:name="jcr:uuid" sv:type="String">
      <sv:value>f0efd8c8-d382-4aac-bdeb-84e3e98733f2</sv:value>
   </sv:property>
   <sv:property sv:name="metadataStandard" sv:type="String">
      <sv:value>Simple Dublin Core Metadata Element Set (DCMES)</sv:value>
   </sv:property>
   <sv:property sv:name="mgnl:lastModified" sv:type="Date">
      <sv:value>2021-02-17T14:54:58.431Z</sv:value>
   </sv:property>
   <sv:property sv:name="mgnl:lastModifiedBy" sv:type="String">
      <sv:value>superuser</sv:value>
   </sv:property>
   <sv:property sv:name="mgnl:tags" sv:type="String" sv:multiple="true" />
   <sv:node sv:name="jcr:content">
      <sv:property sv:name="jcr:primaryType" sv:type="Name">
         <sv:value>mgnl:contentNode</sv:value>
      </sv:property>
      <sv:property sv:name="jcr:uuid" sv:type="String">
         <sv:value>33176eca-9329-4d57-886f-469e7d685b3e</sv:value>
      </sv:property>
      <sv:property sv:name="extension" sv:type="String">
         <sv:value>jpg</sv:value>
      </sv:property>
      <sv:property sv:name="fileName" sv:type="String">
         <sv:value>6376.jpg</sv:value>
      </sv:property>
      <sv:property sv:name="height" sv:type="Long">
         <sv:value>510</sv:value>

jcrDetail:
  class: info.magnolia.ui.contentapp.detail.DetailDescriptor
  datasource: *datasource
  itemProvider:
    $type: jcrNodeFromLocationProvider
    nodeType: mgnl:asset
  actions:
    commit:
      class: info.magnolia.dam.app.action.JcrAssetCommitActionDefinition
    cancel:
      $type: closeAction
  form:
    properties:
      upload:
        factoryClass: info.magnolia.dam.app.field.factory.DamUploadFieldFactory
        class: info.magnolia.ui.editor.UploadViewDefinition
        required: true
        itemProvider:
          $type: jcrChildNodeProvider
          nodeName: jcr:content
          nodeType: mgnl:resource