{ "custom_priv_key": { "crv": "P-256", "d": "2zqwPP8bQUIEngCuNdpBtmcM-YwNMXqPcDYft6YaSio", "kty": "EC", "use": "sig", "x": "qRDosvLFLGzZO9qpzLoVXIqL9PNcHabuix7aMpmTnCY", "y": "-Dv0N4xICZUnKRLNDrjVjC9xrVxH8-VVPAZpysm-_u8", "kid": "6" } }