If the clicked block is Stone, no Bedrock and no entity is in the way, it will place the structure "structure:mine" excluding (potentially) saved Entities moved up by 5 blocks. (The low coordinate corner will start 5 blocks above the block you would have placed if this item were a block).
If you leave out "offset", it will place the structure at the block you clicked at, expanding in your view direction, up and to both sides. if you look up or down, it'll place the structure centred above or below the block you clicked at.
If you leave out "replaceEntities" or set it to 1, it will allow placement even if non player entities are in the way of blocks (non structure voids). Those will get deleted.