Dont know how to read signal values from JSON...

Hello, so I have some EEG readings that I use in a python script for some ML model. The results and all the interesting info from these readings are exported into a JSON file that I wanted to use in Tableau public for some cool representations of the interesting info. The JSON file follows this structure:

{
	"User_data":{
		"Name": "Randomname",
		"Age": 19,
		"Gender": "M",
		"Diagnosis": "randomdiagnosis",
		"Diagnosis_certainy": 0.87
	},
	"EEG_readings":{
		"Time": [1, 2, 3, ... , 50]
		"Fp1": [55000, 55083, 55072,  ...],
		"Fpz": [55000, 55083, 55072,  ...],
		"Fp2": [55000, 55083, 55072,  ...]
	},
	.
	.
	.
}

So as you see these EEG signals are named Fp1 Fpz and Fp2 and there is also another list, time, that represent the moment of the reading. These lists come from Python lists, and my objective is to watch these signals into line charts that respect their positions. My problem is when I connect to the JSOn file the columns of Fp1, Fp2 and Fpz do weird things. For example Fp1 only appear in all the rows as one value, same as Fp2. Only Fpz appear with its different values but even in the table the values appear in different order! here a picture of the table when I connect to the JSON file:

You can see that Fp1 appear with the number 54953 and that value repeats itself in all the samples, the same with Fp2 and with the "Time". How can I solve this problem? also how could I represent line charts with them?

Thank you in advance