shell> curl -X PUT --header 'If-Match: "10422"' --data-binary @- --dump - http://localhost:8529/_api/document/products/10418 <<EOF
{"other":"content"}
EOF

HTTP/<span class="hljs-number">1.1</span> <span class="hljs-number">412</span> Precondition Failed
etag: <span class="hljs-string">"10418"</span>
content-type: application/json; charset=utf<span class="hljs-number">-8</span>

{ 
  <span class="hljs-string">"_id"</span> : <span class="hljs-string">"products/10418"</span>, 
  <span class="hljs-string">"_key"</span> : <span class="hljs-string">"10418"</span>, 
  <span class="hljs-string">"_rev"</span> : <span class="hljs-string">"10418"</span>, 
  <span class="hljs-string">"code"</span> : <span class="hljs-number">412</span>, 
  <span class="hljs-string">"error"</span> : <span class="hljs-literal">true</span>, 
  <span class="hljs-string">"errorMessage"</span> : <span class="hljs-string">"precondition failed"</span>, 
  <span class="hljs-string">"errorNum"</span> : <span class="hljs-number">1200</span> 
}