611 when calling leads.json

[Anonymous]

Hello,

New Marketo user, trying to get started on the REST APIs.

Am able to successfully create an oauth token, and am able to call various REST APIs (e.g. "/stats/usage/last7days.json"). However, when I try and update a lead - e.g.

curl --data '{"action":"updateOnly","lookupField":"email","input":[{"email":"testLead@gmail.com","firstName":"UpdatedFirstName"}]}' --header "Content-Type:json" https://our_instance.mktorest.com/rest/v1/leads.json?access_token=validAccessToken

(obviously our_instance and validAccessToken are correct!) I get 

{"requestId":"1197d#14a4d561cce","success":false,"errors":[{"code":"611","message":"System error"}]}

as a response. I'm trying to use the email field to look up the contact I want to update, and then change their first name.

Any clues?!

Thanks

Jon.
 

[Anonymous]

Ah! Got it!

content-type needs to be "application/json;charset=UTF-8", not just "json". I was interpreting the ruby code example too literally.

Jon.
 

[Anonymous]

You are correct that content type needs to be "application/json;charset=UTF-8".  Specifying " :content_type => :json" is the convention used by the rest_client gem I implented this code sample with.

I am working on code samples in other programming languages now, so I'll make sure this is more clear going forward.