Import entries json

I am trying to import entries via json using CLI and it shows entries are added successfully, but none of the data comes through.

[
  {
    "Name (Prefix)": "",
    "Name (First)": "Test",
    "Name (Middle)": "",
    "Name (Last)": "Great"
}
]

What am I missing? Thanks!

You need to use the field or input IDs as the keys to the values.