title: JSONRPC request with curl
body: <p>I have a 32602 error for all requests using dictionary as params, whereas these work with a simple params.</p>
  
  <p>For example:</p>
  
  <p><code>curl -d '{"id":"json","method":"add","params":[1,2] }' -o – ‘http address for json rpc’</code> </p>
  
  <p>works, but :</p>
  
  <p><code>curl -d '{"id":"json","method":"add","params":[{"a":2,"b":3}] }' -o – ‘http address for json rpc’’</code> </p>
  
  <p>returns a 32602 error (Invalid parameters!!!)</p>
  
  <p>I need to put at params a name and a type and I need a dictionary for this, but I receive a 32602 error. What is wrong ?</p>