V 6.0 Not able to setup location [{Top , left}] of Signature and Signature Block in Adobe ESign Api

I am not able to set location ...Its very urgent I am sending the bottom Json in the body using follwoing code of C# language. And I am calling api as follow

Please find the attached sample document which i receieved as a receipent

IRestResponse responsesend1 = clientsend1.Execute(requestsend1);
Following Json is sent through body But not able to set location of
string raw2 = "

{
"fields":[
{
"backgroundColor":"#ffffff",
"borderColor":"",
"borderStyle":"SOLID",
"borderWidth":-1.0,
"displayLabel":"",
"visible":true,
"inputType":"BLOCK",
"tooltip":"",
"fontColor":"",
"fontName":"",
"fontSize":-1.0,
"alignment":"LEFT",
"displayFormat":"",
"displayFormatType":"DEFAULT",
"masked":false,
"maskingText":"*",
"radioCheckType":"CIRCLE",
"conditionalAction":{
"anyOrAll":"ANY",
"action":"SHOW"
},
"contentType":"SIGNATURE_BLOCK",
"defaultValue":"",
"readOnly":false,
"valueExpression":"",
"calculated":false,
"urlOverridable":false,
"required":true,
"minLength":-1,
"maxLength":-1,
"minValue":-1.0,
"maxValue":-1.0,
"validationErrMsg":"",
"validation":"NONE",
"origin":"GENERATED",
"name":"echosign_signatureblock_0",
"locations":[
{
"pageNumber":1,
"top":216.48187255859375,
"left":15.0,
"width":280.0,
"height":39.0
}
],
"assignee":"CBJCHBCAABAABBoFiZE7nArbkd6T1uzRuFZQYvAygoT8"
}
]
}"