{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x032fb093062b41b9657277a1e5eacffee8e665b4aa418b954145c020dae7593d",
    "signature": "0x738c4207338bac23c0b845e96337ddd0c424f408adbce7fa62dcdc81ca5c3b0d24e234fd82e2524decb7c69464c5107a9266dfe63187f4d6492ec30908dc36fb1b",
    "signer": "0x175A3bebFa14E64C549CAc2962191B2B8C788421",
    "userId": "6270901"
  }
}