fields having special character/symbol not able to populate in fillable intake pdf sheet using FILL PDF smart service.

we have an requirement where we need to populate some fields from pdf using fill pdf smart service.
fields not having special character or symbol are populating successfully but fields those are having special character unable to populate.
so anyone can help to resolve this issue.

snippet for the code are as below.

{
  {name : "County", value : "Adam"},  
  {name : "Parcel No", value : "98765"},
  {name : "Price/Consideration", value : "77777"},
  {name : "Doc. 1 â`“ Grantor(s) Name(s)", value : "Mike"}
  
  
}