How add a new property to an page on Confluence via REST API?

[Rafael Costa]

I need update the classification of some pages, then I found it at https://developer.atlassian.com/cloud/confluence/rest/api-group-content-properties/#api-wiki-rest-api-content-id-property-key-post:

curl --request POST \ --url 'https://your-domain.atlassian.net/wiki/rest/api/content/{id}/property/{key}' \ --header 'Authorization: Bearer <access_token>' \ --header 'Accept: application/json' \ --header 'Content-Type: application/json' \ --data '{ "value": [ "<string>" ] }'

But there is something wrong in my curl that returns error 500:

curl \
   -X POST \
   --header 'Accept: application/json' \
   --header 'Content-Type: application/json' \
   --data '{
      "value":{
         "name":{
            "value":"Interno",
            "search":"Interno",
            "index":2
         },
         "icon":{
            "url":"/images/blue.png"
         }
      }
      "version":{
         "number":null
      }
  }' \
-u $user:$password \
"https://your-domain.atlassian.net/rest/api/content/111578749/property/classification"

someone could help me to fix it??