PDF Tools - Create PDF Smart Service

I am using create pdf smart service to generate a new pdf document.

I am confused what will be the possible input for the content field of Create PDf smart service.

I have tried two options 

1- I have using regular string but than i get an error 

[An error occured while trying to verify the Contents input: java.lang.String cannot be cast to [Ljava.lang.Object;]

2- I have used 

'type!{urn:appian:ps:pdftools}PdfContent'(
page: 1,
xPercent: 10,
yPercent: 10,
angle: 0,
sections: {
{
style: rule!PDF_convertToPDFstyle(),//return PDFStyle type data
components: {
{
style: rule!PDF_convertToPDFstyle(),
value: "Shivam"
},
{
style: rule!PDF_convertToPDFstyle(),
value: "Gupta"
}
}
}
}
) to get data of type PDFContents that has specified in reference document.

But than I am getting an error

[An error occured while trying to verify the Contents input: java.util.LinkedHashMap cannot be cast to [Ljava.lang.Object;]

Please provide any input on how this should be configured.