{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67bf01ed9f633930ef4d9c35ff19596778ea2474966e934354c3bbce6f7a8a99",
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    "signer": "0x9D0493548DA5A09464F488E2421c2d531019A38f",
    "userId": "312392945"
  }
}