{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6b84df9bc16bcc41c8e79d62a53553182bb0419ace867889f810ff546fc7b466",
    "signature": "0xc6f45cd737ba663449ebf301824ca2140dc93f8e373fcd768a1b4c03bb659fde1f35f52a64555fff1740ffd22c5f1bd6478f082e0d65a06c01c8c5047ebd262c1c",
    "signer": "0x96955EF477cCb3ac1d4f5c5e5A540b3F4D7F29B7",
    "userId": "539542722"
  }
}