ASN1 OID: secp521r1
NIST CURVE: P-521
-----BEGIN EC PARAMETERS-----
BgUrgQQAIw==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIAFwRmxnrUpSzry9y1gD32Ahr6Vxm1NK7gJUFgmftir37yftsyucaz
vLGcpBEEYmtylCFHKa95Fcy0VNxAAaUfVyOgBwYFK4EEACOhgYkDgYYABAD3gANm
zvkxOBN8MYwRBYO6B//7TTCtA2vwG/W5bqiVVxznXWj0xiFrgayApvH7FDpLHiJ8
+c1vUsRVEa8PY5QPsgFow+xv0P2WSrRkn4/UUquftPs1ZHPhdr06LjS19ObvWM8x
FZYU6n0i28UWCUR5qE+BCTzZDWYT8V24YD8UhpaYIw==
-----END EC PRIVATE KEY-----