{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc33ac10f6d479136e8aede09f593f5652020b1a7853c6f5cc7f153d475bf8190",
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    "signer": "0x8AA1b904aa25Bacf1260c22525f9b63F72B44846",
    "userId": "588085632"
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}