Creating a Score/Highscore image at runtime

Hi!

When the player dies in my game, I want to take a screenshot of him, and share it to multiple social networks. That is already done, but in that image, I want to show the high score and how much time it took to win, like Hill Climb Racing for example.

So I have the screenshot, I read pixels from a Render Texture, then convert it to Texture2D and then share it, I want the score and time to BE PART of that image you are sharing.

What do you think is the best solution for this?

Thank you!