{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x27b19a5416d83e74e23f2326bed3989e3409517d9afa2feda65d747df7e0dc7c",
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    "signer": "0x1fdc5a13176CD8f20e76f80261123B1b356B161e",
    "userId": "592330838"
  }
}