Where do I have to set the data that I want to advertise through eddystone URL?

I've tried this but it does not work: 

static void adv_slots_init(void) {
   uint8_t default_frame_data[] = {0x03,0x03,0xAA, 0xFE,0x13,0x16,0xAA, 0xFE,0x10, 0xF8,0x03,'g','o','o','.','g','l','/','a','0','m','n','s','S'};
   
    es_slot_t default_adv_slot = {.slot_no             = 0,
                                  .radio_tx_pwr        = 0,
                                  .adv_frame.type      = DEFAULT_FRAME_TYPE,
                                  .adv_frame.length    = sizeof(default_frame_data),
                                  .adv_custom_tx_power = false,
                                  .configured          = true};

    memcpy(&default_adv_slot.adv_frame.frame, default_frame_data, sizeof(default_frame_data));

    es_slots_init(&default_adv_slot);
}
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