\":1,\"timestamp\":1521905294,\"data\":{\"payloadType\":\"binary\",\"payload\":null},\"gasPrice\":\"1000000\",\"gasLimit\":\"20000\",\"hash\":\"f52668b853dd476fd309f21b22ade6bb468262f55402965c3460175b10cb2f20\",\"alg\":1,\"sign\":\"cf30d5f61e67bbeb73bb9724ba5ba3744dcbc995521c62f9b5f43efabd9b82f10aaadf19a9cdb05f039d8bf074849ef4b508905bcdea76ae57e464e79c958fa900\"}\" toProto() Convert transaction to Protobuf format. Note: Transaction should be sign before converting. Returns: Transaction data in Protobuf form