{
  "manageEntity": {
    "action": "Save",
    "entityId": "684465455",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x472b91580fc968b7e6aea2b6be0333be45eb1b1e2ba5a011050487f09dd33fe2",
    "signature": "0xc2d4a0e2aece479a870953bad2cafd0346c5bb792f603977c0ac5bbc788e0ffa15d0682bb9ca0c26b86bbadeb323a6e76610bd346ee082d3fc29dcefec3a9e5d1c",
    "signer": "0x7ceA71B4A8C4013A4f57c1A57eC0430915572e86",
    "userId": "31724295"
  }
}