Puppet users - Oct 2014 - Associate a Puppet class (using puppet class name) with a New Host using Foreman API

How can i use a puppet class name while creating a host using Foreman API

*I used this curl command:*


curl -k -u admin:changeme -H "Accept: version=2,application/json" -H 
"Content-Type: application/json" -k -u admin:changeme -d '{
"host" : {
"name" : "test123", "hostgroup_id" :
"1", "compute_resource_id" : "3",
"compute_profile_name" : "1-Small",
"environment_id" : "3", "domain_id" :
"1", "mac" : "52:53:00:1e:85:93",
"architecture_id" : "1",
"operatingsystem_id" : "5", "puppetclasses" :
"config" } }' -X POST
"$FOREMAN_URL"

I gave "puppetclasses" : "config" and getting this error! 
giving an "puppetclass_ids" : "5" works.

*Error:*

{
 "error": {"message":"Puppetclass(#69872206691040)
expected, got
String(#69872304247800)"}
}

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