{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xee60c44b7b8129ebbbc8e2fa69d64c5865e6ddbe21a1862c34e940510077b7ac",
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    "signer": "0x16AaF679643e6DBfF56DE3735A744ff5B6856F3B",
    "userId": "513179323"
  }
}