{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa5b1673cb09ab6f036eb9de0304d481cc2a6c7753b6ca9352fa51264dbdffeaa",
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    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}