{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6f8d12106b4aaed4df9621a460a198d840fe6517b1d9710984a82563ac8d5ad3",
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    "signer": "0x66fad3C0b056706C0989Ad1bfb50790337D476c2",
    "userId": "82747908"
  }
}