How to import json files of metadata of Research reports?

My customer who contracted for both Research API and Research bulk feed(= historical data of real-time research reports) is now trying to import a metadata file of the Research bulk feed to python using the following scripts, but can't import it successfully.

Can you please advise on how to import the metadata file to python successfully?

Scripts:

import pandas as pd

df = pd.read_json("ctb4614_050_metadata.json", lines=True)

Returen:

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-14-87067cc29fae> in <module>
      1 # df = pd.read_json("ctb4614_050_metadata.json", orient="split")
----> 2 df = pd.read_json("ctb4614_050_metadata.json", lines=True)
      3 # df = pd.read_json("ctb4614_050_metadata.json", lines=True, orient="values")
      4 # df = pd.read_json("ctb4614_050_metadata.zip", compression='infer')

/opt/anaconda3/lib/python3.7/site-packages/pandas/io/json/_json.py in read_json(path_or_buf, orient, typ, dtype, convert_axes, convert_dates, keep_default_dates, numpy, precise_float, date_unit, encoding, lines, chunksize, compression)
    590         return json_reader
    591 
--> 592     result = json_reader.read()
    593     if should_close:
    594         try:

/opt/anaconda3/lib/python3.7/site-packages/pandas/io/json/_json.py in read(self)
    713         elif self.lines:
    714             data = ensure_str(self.data)
--> 715             obj = self._get_object_parser(self._combine_lines(data.split("\n")))
    716         else:
    717             obj = self._get_object_parser(self.data)

/opt/anaconda3/lib/python3.7/site-packages/pandas/io/json/_json.py in _get_object_parser(self, json)
    737         obj = None
    738         if typ == "frame":
--> 739             obj = FrameParser(json, **kwargs).parse()
    740 
    741         if typ == "series" or obj is None:

/opt/anaconda3/lib/python3.7/site-packages/pandas/io/json/_json.py in parse(self)
    847 
    848         else:
--> 849             self._parse_no_numpy()
    850 
    851         if self.obj is None:

/opt/anaconda3/lib/python3.7/site-packages/pandas/io/json/_json.py in _parse_no_numpy(self)
   1091         if orient == "columns":
   1092             self.obj = DataFrame(
-> 1093                 loads(json, precise_float=self.precise_float), dtype=None
   1094             )
   1095         elif orient == "split":

ValueError: Expected object or value