Example Facebook Ad:

{"items":["d64544e5-1735-4f8a-ae30-24131467db9a"],"styles":{"galleryType":"Columns","groupSize":1,"showArrows":true,"cubeImages":true,"cubeType":"fit","cubeRatio":1,"isVertical":true,"gallerySize":30,"collageAmount":0,"collageDensity":0,"groupTypes":"1","oneRow":false,"imageMargin":5,"galleryMargin":0,"floatingImages":0,"chooseBestGroup":true,"smartCrop":false,"hasThumbnails":false,"enableScroll":true,"isGrid":true,"isSlider":false,"isColumns":false,"isSlideshow":false,"cropOnlyFill":false,"fixedColumns":0,"enableInfiniteScroll":true,"isRTL":false,"minItemSize":50,"rotatingGroupTypes":"","rotatingCubeRatio":"","gallerySliderImageRatio":1.7777777777777777,"numberOfImagesPerRow":3,"numberOfImagesPerCol":1,"groupsPerStrip":0,"borderRadius":0,"boxShadow":0,"gridStyle":0,"mobilePanorama":false,"placeGroupsLtr":false,"viewMode":"preview","thumbnailSpacings":0,"galleryThumbnailsAlignment":"bottom","isMasonry":false,"isAutoSlideshow":false,"slideshowLoop":false,"autoSlideshowInterval":4,"bottomInfoHeight":0,"titlePlacement":"SHOW_ON_HOVER","galleryTextAlign":"center","scrollSnap":false,"itemClick":"expand","fullscreen":true,"videoPlay":"hover","scrollAnimation":"NO_EFFECT","scrollDirection":0,"overlayAnimation":"NO_EFFECT","arrowsPosition":0,"arrowsSize":23,"watermarkOpacity":40,"watermarkSize":40,"useWatermark":true,"watermarkDock":{"top":"auto","left":"auto","right":0,"bottom":0,"transform":"translate3d(0,0,0)"},"loadMoreAmount":"all","defaultShowInfoExpand":1,"allowLinkExpand":true,"expandInfoPosition":0,"allowFullscreenExpand":true,"fullscreenLoop":false,"galleryAlignExpand":"left","addToCartBorderWidth":1,"addToCartButtonText":"","slideshowInfoSize":200,"playButtonForAutoSlideShow":false,"allowSlideshowCounter":false,"hoveringBehaviour":"APPEARS","thumbnailSize":120,"magicLayoutSeed":1,"imageHoverAnimation":"NO_EFFECT","imagePlacementAnimation":"NO_EFFECT","calculateTextBoxWidthMode":"PERCENT","textBoxHeight":0,"textBoxWidth":200,"textBoxWidthPercent":50,"textImageSpace":10,"textBoxBorderRadius":0,"textBoxBorderWidth":0,"loadMoreButtonText":"Load more","loadMoreButtonBorderWidth":1,"loadMoreButtonBorderRadius":0,"imageInfoType":"NO_BACKGROUND","itemBorderWidth":0,"itemBorderRadius":0,"itemEnableShadow":false,"itemShadowBlur":20,"itemShadowDirection":135,"itemShadowSize":10,"imageLoadingMode":"BLUR","expandAnimation":"NO_EFFECT","imageQuality":90,"usmToggle":false,"usm_a":0,"usm_r":0,"usm_t":0,"videoSound":false,"videoSpeed":1,"videoLoop":true,"gotStyleParams":true,"selectedLayout":"2|bottom|1|fit|true|0|true","allowSocial":true,"allowDownload":true,"allowTitle":true,"allowDescription":false,"loveButton":true,"loveCounter":true,"showVideoPlayButton":true,"galleryImageRatio":2,"sharpParams":{"quality":90,"usm":{}},"galleryHorizontalAlign":"center","galleryVerticalAlign":"center","imageLoadingWithColorMode":"PICKED_COLOR","imageRatioType":"FIXED","numberOfDisplayedItems":3,"itemBorderColor":{"themeName":"color_15","value":"rgba(88,85,81,1)"},"itemShadowOpacityAndColor":{"themeName":"color_15","value":"rgba(88,85,81,0.2)"},"textBoxBorderColor":"color-5","titleDescriptionSpace":6,"textsVerticalPadding":0,"textsHorizontalPadding":0,"textBoxFillColor":"color-2","alwaysShowHover":false,"isStoreGallery":false,"previewHover":false,"calculateTextBoxHeightMode":"MANUAL","galleryLayout":2,"useCustomButton":false,"customButtonText":"","itemOpacity":{"themeName":"color_15","value":"rgba(88,85,81,0.6)"},"itemFont":{"style":{"bold":false,"italic":false,"underline":false},"family":"din-next-w01-light","preset":"Heading-M","editorKey":"font_5","size":26,"fontStyleParam":true,"displayName":"Basic Heading","value":"normal normal normal 26px/1.2em din-next-w01-light,din-next-w02-light,din-next-w10-light,sans-serif"},"itemFontSlideshow":{"family":"din-next-w01-light","displayName":"Basic Heading","style":{"bold":false,"italic":false,"underline":false},"size":26,"preset":"Heading-M","editorKey":"font_5","fontStyleParam":true,"value":"font:normal normal normal 26px/1.2em din-next-w01-light,din-next-w02-light,din-next-w10-light,sans-serif;"},"itemDescriptionFontSlideshow":{"family":"enriqueta","displayName":"Paragraph 2","style":{"bold":false,"italic":false,"underline":false},"size":14,"preset":"Body-M","editorKey":"font_8","fontStyleParam":true,"value":"font:normal normal normal 14px/1.3em enriqueta,serif;"},"itemDescriptionFont":{"family":"enriqueta","displayName":"Paragraph 2","style":{"bold":false,"italic":false,"underline":false},"size":14,"preset":"Body-M","editorKey":"font_8","fontStyleParam":true,"value":"normal normal normal 14px/1.3em enriqueta,serif"},"itemFontColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"itemFontColorSlideshow":{"themeName":"color_15","value":"rgba(88,85,81,1)"},"itemDescriptionFontColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"itemDescriptionFontColorSlideshow":{"themeName":"color_15","value":"rgba(88,85,81,1)"},"loadMoreButtonFont":{"family":"enriqueta","displayName":"Paragraph 2","style":{"bold":false,"italic":false,"underline":false},"size":14,"preset":"Body-M","editorKey":"font_8","fontStyleParam":true,"value":"normal normal normal 14px/1.3em enriqueta,serif"},"loadMoreButtonFontColor":{"themeName":"color_15","value":"rgba(88,85,81,1)"},"loadMoreButtonColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"loadMoreButtonBorderColor":{"themeName":"color_15","value":"rgba(88,85,81,1)"},"arrowsColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"oneColorAnimationColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"responsive":false,"targetItemSize":405,"isAccessible":false,"allowLeanGallery":false,"layoutsVersion":2,"selectedLayoutV2":2,"isSlideshowFont":false,"externalInfoHeight":0,"externalInfoWidth":0},"container":{"top":"","bottom":"","left":"","right":"","width":320,"height":320,"position":"","avoidGallerySelfMeasure":true,"galleryWidth":330,"galleryHeight":320,"scrollBase":0}}