Djongo - trying to create a list field

I'm trying to explore Django and djgono for fun. I want to create a document in the db which is similar to the following document:

{
    "title": "Djongo - trying to create a list field",
    "body": "I cannot do basic programming...epic fail!",
    "tags": ["django","djongo","list"]
}

Following is my code:

from djongo import models

class Post(models.Model):
    title = models.CharField(max_length=255)
    body = models.TextField(max_length=1000)
    tags = models.JSONField()

I tried to add the document from django admin. Entered exactly ["django","djongo","list"] in the Tags field. I get the following error:

Value: ["django","djongo","list"] stored in DB must be of type dict/listDid you miss any Migrations?

Clearly I am going horribly wrong somewhere. Would be happy if someone pointed me in the right direction.

Thanks!

EDIT: further clarification added.