Passing JSON via webhooks

Hello,

I am trying to set up a webhook for Mandrill, and it requires passing a jSON argument. I've placed the JSON in the parameter in user defined format section. The issue is that Zoho is encompassing the jSON in quotes when sending the post request, which is causing the parameter in question to not be read as an array. Here is what I have entered in the parameter in user defined format section:

parameter name: message

Description:
{"from_email":" test@senderemail.com",
        "to":[{"email":" test@receivingemail.com"}],
        "subject": "Sending a text email from the Mandrill API using CRM",
        "html": "<p> From CRM.</p>",
        "autotext" : true}

and this is the request going out:

 
 
{" message":     "{\"from_email\":\"

test@senderemail.com\",\n \"to\":[{\"email\":\"

    test@receivingemail.com\"}],\n \"subject\": \"Sending a text email from the Mandrill API using CRM\",\n \"html\": \"<p> From CRM.</p>\",\n \"autotext\" : true}"}

I've coloured the troublesome quotation marks. I've sent the request using other means, and if they are not there, it works. Is there a way around this?