{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9c9647d439d8df458647cf58150861ba6479ebcda0806edf7ade9eb9ef0f5286",
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    "signer": "0x5457085B816CAD8ABdf1b4048a0623743B14ae53",
    "userId": "848996801"
  }
}