{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0201e43e7ed0b990b14bfb2835bea64569fd532aebf110accccc2387daabe3f",
    "signature": "0x1ba6e773bbd460aa63dd659180d55025fa99c2854ed1ca1e5e45fa840f4e376b3861eced7886ac349bb8ccf872bd128c65f34f5cd754d40b3fc32743f24e1cd21c",
    "signer": "0xBE1d5FDFb2CE474A3f7f1144aEF2F8EDE22d61Ff",
    "userId": "108816633"
  }
}