{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2ff2e86c655f97a802da4e3f8e74bb1571d39124c20062829313dc63ac2b7c7c",
    "signature": "0xfb809809963d29d87a6e1304bc01adb4544e2f029438baa7a337a3a258f7a4ee13f0b8c321681393dee65ea4bc7fed65cdd4000c0803ddcbe64d92d92029b2b81b",
    "signer": "0xc4ED754a5bBD176F596aF6d483c4b0F8A9B72530",
    "userId": "995186910"
  }
}