/system/vrfs/{name}/dhcpv6_server/dhcpv6_server_pools/{pool_name}/dhcpv6_server_options/{uuid}

put

https://switch-ip/rest/v10.04/system/vrfs/{name}/dhcpv6_server/dhcpv6_server_pools/{pool_name}/dhcpv6_server_options/{uuid}

Language

Click Try It! to start a request and see the response here!