{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1565704692277ea103f0825631d67b17f6dd721cef6bafe0a8218aa3ffba26bc",
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    "signer": "0x197d39f11BC92Ab9BCe49DEd40093f8c1D72B802",
    "userId": "455947464"
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}