{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d8c3ac456789f7ac2b25eb537df990e0152fe4335cae4bc363e090f31a91482",
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    "signer": "0x54ED3C5B13b86Fc420a6bD0D93B92086369BEEB3",
    "userId": "783546574"
  }
}