The attributes used - 
bs_id     String
bs_id
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
records = bmql("select username, password, reviseUrl, requestUrl from integration.remoteApproval");
username=""; password=""; reviseUrl=""; requestUrl="";
for record in records {
	reviseUrl=get(record, "reviseUrl");
	requesturl=get(record, "requestUrl");
	username = get(record, "username");
	password = get(record, "password");
} 
json = "{\"processDefId\":\"default~CPQApprovalDemo!3.0~QuoteApprovalProcess\",
\"serviceName\":\"QuoteApprovalProcess.service\",\"operation\":\"start\",\"payload\":
\"<quot:start xmlns:quot=\'http://xmlns.oracle.com/bpmn/bpmnCloudProcess/CPQApprovalDemo
/QuoteApprovalProcess\'><requestor>Suyog</requestor><quoteId>" +bs_id + "</quoteId>
<quoteTotal>12567</quoteTotal><discountPercentage>23</discountPercentage>
<requestorEmail>approve_pCSsubmit</requestorEmail></quot:start>\",\"action\":\"Submit\"}";
header = dict("string");
put(header, "Accept", "application/json");
encodeCredential = encodebase64(username+":"+password);
print(username);
print(password);
put(header, "Authorization", "Basic "+encodeCredential);
put(header, "Content-Type", "application/json");
response = urldatabypost(requestUrl, json, "",header,true);
//response = urlmultipartbypost(requestUrl,json,header);
//processString= get(response,"Message-Body");
if(find(lower(response), "error")<0) {
      return jsonget(json(response),"processId","String"); 
} else {
      throwerror(response); 
       return ""; 
}