message: Add structure to decode a send token transaction
diff: @@ -138,6 +138,13 @@ export class TransactionBuilder extends BaseTransactionBuilder {
  this._contractAddress = transactionJson.to;
  this._transfer = new TransferBuilder(transactionJson.data);
  break;
  + case TransactionType.SendToken:
  + if (transactionJson.to === undefined) {
  + throw new BuildTransactionError('Undefined contract address');
  + }
  + this._contractAddress = transactionJson.to;
  + this._transferToken = new TransferTokenBuilder(transactionJson.data);
  + break;
  default:
  throw new BuildTransactionError('Unsupported transaction type');
  //TODO: Add other cases of deserialization
  