{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xec422e8642d2aa82376b73ea23d4fed42a611147932f9a6043439abd6bcbece4",
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    "signer": "0x1A41243Ac743D6F421B96e0416887A18f5cb61a0",
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}