{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1506c367187b5713b9d514deddbd95374669a88fd3e5dcb98f1e6574f427057b",
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    "signer": "0xF1E622923dCBDeB0fca925183E9C500e78F9ce9d",
    "userId": "632120348"
  }
}