ELasticsearch Post bulk on elastic xpack role - api

Question

I have an Elastic cluster with xpack enable.
I'd like to make a backup of all xpack roles created :
GET _xpack/security/role
=> I get a big JSON, ex :
{
"kibana_dashboard_only_user": {
"cluster": [],
"indices": [
{
"names": [
".kibana*"
],
"privileges": [
"read",
"view_index_metadata"
]
}
],
"run_as": [],
"metadata": {
"_reserved": true
},
"transient_metadata": {
"enabled": true
}
},
"watcher_admin": {
"cluster": [
"manage_watcher"
],
"indices": [
{
"names": [
".watches",
".triggered_watches",
".watcher-history-*"
],
"privileges": [
"read"
]
}
],
"run_as": [],
"metadata": {
"_reserved": true
},
"transient_metadata": {
"enabled": true
}
},
....
}
And now I'd like to put it back in the cluster (or another). I cannot just PUT it to _xpack/security/role. If i understand correctly I have to use bulk :
$ curl --user elastic:password https://elastic:9200/_xpack/security/_bulk?pretty -XPOST -H 'Content-Type: application/json' -d '
{"index":{"_index": "_xpack/security/role"}}
{"ROOOOLE" : {"cluster" : [ ],"indices" : [{"names" : [".kibana*"],"privileges" : ["read","view_index_metadata"]}],"run_as" : [ ],"metadata" : {"_reserved" : true},"transient_metadata" : {"enabled" : true}}}
'
But I get an error:
{
"took" : 3,
"errors" : true,
"items" : [
{
"index" : {
"_index" : "_xpack/security/role",
"_type" : "security",
"_id" : null,
"status" : 400,
"error" : {
"type" : "invalid_index_name_exception",
"reason" : "Invalid index name [_xpack/security/role], must not contain the following characters [ , \", *, \\, <, |, ,, >, /, ?]",
"index_uuid" : "_na_",
"index" : "_xpack/security/role"
}
}
}
]
}
Is there a way to do this easily? Or do I have to parse the JSON, and put each role one by one to:
_xpack/security/role/rolexxx
_xpack/security/role/roleyyy
...
More globally, is there a way to get all data of an index (config index), then upload it back or put it into another cluster?