Need Example of passing Jasper Reports Parameters for REST v2 API using JSON

Question

When I look at the documentation for passing parameters to the Jasper Report REST 2 API here: http://community.jaspersoft.com/documentation/jasperreports-server-web-services-guide/v550/running-report-asynchronously I see that I need to have a "parameters" dict. The example in the link shows the XML which is not all that useful since it's unclear exactly what the equivalent JSON should look like. The closest I could find is in this link: http://community.jaspersoft.com/documentation/jasperreports-server-web-services-guide/v56/modifying-report-parameters. Now, I am sending the equivalent of that to the server (and every other permutation I can think of), and I continue to get a "400 Client Error: Bad Request" back. I could really use an exact example of the python code to generate the required "parameters" parameter for say "my_parameter_1="test_value_1".

Here is my current POST data (with a few params missing for brevity). I know this is correct since the report works fine if I omit the "parameters" parameter:

    {
      'outputFormat': 'pdf', 
      'parameters': [{'name': 'ReportID', 'value': ['my_value_1']}], 
      'async': 'true', 
      'pages': '', 
      'interactive': 'false'
    }

Answer 1

OK, thanks to rafkacz1 @ http://community.jaspersoft.com/questions/825719/json-equivalent-xml-post-reportexecutions-rest-service who posted an answer, I figured it out. As he report there, the required format is:

    "parameters":{
         "reportParameter":[
             {"name":"my_parameter_1","value":["my_value_1"]}
          ]
     }

Pay particular attention to the plurality of "reportParameter".