POST /api/smart_proxies/:smart_proxy_id/autosign

When using this API with the wrong :smart_proxy_id the error message is misleading.

When using this: https://server/api/smart_proxies/wrongid/autosign'
with payload: { "id": "testing" }

I get the error message: {
"error": {"message":"Resource autosign not found by id 'testing'"}
}

Should the id in the error message be 'wrongid'?