tl;dr:
You Need Your Trained Model to Look Like This SavedModel:

NOT THIS :

Read These Links For More Information

Use saved_model_cli to Inspect SavedModel

# Replace --dir to point to your model path
saved_model_cli show --dir ./pipeline_tfserving/1518648395/ --tag_set serve --signature_def=serving_default

# Example using price and inventory as inputs
saved_model_cli run --dir ./pipeline_tfserving/1518648395/ --tag_set serve --signature_def=serving_default --input_exprs 'price=[3];inventory=[46]'
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