{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d273df32687c7ca0cd9a1bcae57cf3d8283711958f4dec80fd38eb120425cda",
    "signature": "0xb41441cae0aa5e0367bdaf0348d9a44f8fb78804b017b08160183a4d5351a52b7a84400299afb0aa3634816e723b0011fa1137dd232227d660213c312b032ff41b",
    "signer": "0x1D095fdd74D71f435E3C56BdBD687D6a270Acb3E",
    "userId": "169663749"
  }
}