{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ab4ef0093e5e44788e3223b041fafd702cf530655f2987e9ba25b8c4b96efdd",
    "signature": "0x9080fc41fbbb1dda343668e343319105abdf787ccf1e41bce364422238cf31c23e4191c3309f7a1a801d4a10bf71573ca638210d5ef17bf83f03b5fdf8d30e471b",
    "signer": "0x17a508F40418F7f62c556f0D5730f2d28d99fc8C",
    "userId": "594218023"
  }
}