{
  "primary": {
      "type": "ECDSA",
      "curve": "NIST P-256",
      "userid": "test0",
      "usage": ["sign"],
      "expiration": 0,
      "preferences" : {
        "hashes": ["SHA512", "SHA256"],
        "ciphers": ["AES256", "AES128"],
        "compression": ["Zlib"],
        "key server": "hkp://pgp.mit.edu"
      }
   }
}