Request Format
{
"request_type":"get_master_form_instance_ids",
"instance_formcode_start" : <number>,
"instance_formcode_end" : <number>
}
The start and end are optional if the start is not there it starts from index 0 and if the end is not there it goes to min(actual count,index 1000).
Reply Format
{
"instance_formcode_list" : [
{
"instance_formcode" : "<formcode>"
}
...