How should the input JSONL look for a batch prediction job?

[sangersteel]

I can't find any examples online of how an input jsonl is supposed to look for a batch training job. When I tried with this:

{'instances': {'mimeType': 'text/plain', 'content': '0'}}
{'instances': {'mimeType': 'text/plain', 'content': '1'}}
{'instances': {'mimeType': 'text/plain', 'content': '1'}}
{'instances': {'mimeType': 'text/plain', 'content': '2'}}
{'instances': {'mimeType': 'text/plain', 'content': '8'}}
{'instances': {'mimeType': 'text/plain', 'content': 'a'}}
{'instances': {'mimeType': 'text/plain', 'content': 'a'}}
{'instances': {'mimeType': 'text/plain', 'content': 'h'}}
{'instances': {'mimeType': 'text/plain', 'content': 'q'}}
{'instances': {'mimeType': 'text/plain', 'content': 's'}}
{'instances': {'mimeType': 'text/plain', 'content': 'y'}}
{'instances': {'mimeType': 'text/plain', 'content': 'y'}}

I got an error email saying 

Error Messages: BatchPrediction could not start because no valid instances 
were found in the input file.

Is there some other way this should look for it to work? Maybe like

{

'instances': [

{'mimeType': 'text/plain', 'content': 'a'}

{'mimeType': 'text/plain', 'content': 'bc'}

{'mimeType': 'text/plain', 'content': 'de'}]

}