{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1b48f821f640dfa45cabf03429938f17eb4cabfd0bbaef2939923e692f3dc098",
    "signature": "0x618f6e0d5684bd087b9a3b01f78915de522ffc8d164f88ee02e9f3deb2a450e16146d5f6f3ced405e8b6cc9b7880c8ed103390c907610c09df71051baca13e8e1b",
    "signer": "0x4DDd196F82e57869E706Fd10381a359418B104Bb",
    "userId": "585727851"
  }
}