ASN1 OID: secp521r1
NIST CURVE: P-521
-----BEGIN EC PARAMETERS-----
BgUrgQQAIw==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIBeUC4M+VTW5797b58aOS2w1AADTlkBfZaXUGrs9mnyxx9NEZcLVYm
oGrHPU94WBRmbPyGPItbVCmJk0jZVIu+nZGgBwYFK4EEACOhgYkDgYYABAET/BOz
Bb9Jx9b52VIHFP4g/uk5KceDpz2M+/Ln9WiDjsMfb4NgNCAB+EMNJUX/TNBLFFmq
r7c6+zUH+QAo2qstvQDsReyFkETRB2vZD//nCZfcAe0RMtKZmgtQLKXzSlimUjXB
M4/zE5lwE05aXADp88h8nuaT/X4bll9cWJlH0fUykA==
-----END EC PRIVATE KEY-----