Strange errors in JSON file loading.

So I'm trying to make an item with a custom model (.json) for a mod. It's not anything insane. But everytime I try to run client, it gives me the same error three times, and when in the game the model shows up as a null block. 

This is the error;

[resourceLoad/ERROR] [minecraft/ModelManager]: Failed to load model eyeglass:models/custom/damned_heart.json
com.google.gson.JsonSyntaxException: Missing axis, expected to find a string

I don't know what this means, but it wants me to fix something. Any help knowing what would be largely apreciated. 

If it helps, the model was made + textured in Blockbench. Also, this is a screenshot of the intended design: