[Answer]-I am getting 400 BAD REQUEST in tastypie

Your JSON is invalid. Please validate your curl data here. The 400 (bad request) status should give you clue about that. To make sure you can create serializer which can handle that exception.

from tastypie.exceptions import BadRequest

class VerboseSerializer(Serializer):
    """
    Gives message when loading JSON fails.
    """
    # Tastypie>=0.9.6,<=0.11.0
    def from_json(self, content):
        """
        Override method of `Serializer.from_json`. Adds exception message when loading JSON fails.
        """
        try:
            return json.loads(content)
        except ValueError as e:
            raise BadRequest(u"Incorrect JSON format: Reason: \"{}\" (See www.json.org for more info.)".format(e.message))

class MyResource(BaseModelResource):
    class Meta:
        serializer = VerboseSerializer(formats=['json'])