create an account Id using AccountCreateTransaction() from the public key it will show protobuff err

[SevenbitsDarshan]

When I try to create an account Id using AccountCreateTransaction() from the public key it will show protobuff err

So I want to convert string public key to protobuf format like this in Javascript:

PublicKey {

  _key: PublicKey {

    _key: EcdsaPublicKey {

      _keyData: <Buffer 03 9b 13 0d 78 c0 cd 02 dd cc 94 1e 83 e2 ea 4e ef 4d b9 1b ec 5c 95 e8 8e e3 e9 99 26 e5 b3 2c 74>

    }

  }

}