{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1647a54f84a0537547f41a0e697aa5524f11a87884bc160b7cffdc2760e9f5e0",
    "signature": "0x552ffca7a3ab1d20f689b074ef7a545e0e387b47a6fa1b0cfdd752002a58aa363abb46f1c3be4631daea53eb1be7c7cea18ce1aa599475a72f1597af70256e5f1b",
    "signer": "0x2D4A56e6b6247282BDea02AcAdEf29e0105Ec131",
    "userId": "668770242"
  }
}