TIMESTAMP = 1523095599
SHA256 (google-protobuf-v3.5.2_GH0.tar.gz) = 4ffd420f39f226e96aebc3554f9c66a912f6cad6261f39f194f16af8a1f6dab2
SIZE (google-protobuf-v3.5.2_GH0.tar.gz) = 4584659