/give @p sign 1 0 {
    BlockEntityTag: {
        Text1: "{\"text\":\"Skywars \",\"color\":\"red\",\"bold\":true}",
        Text2: "{\"text\":\"Entrar\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"tp @s 169 102 266\"}}"
    },
    display: {
        Name: "Custom Sign"
    }
}