{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8fefcdb933b71996646fd103bc359818437f90f8d4a8253ad26b7cd52a7aa523",
    "signature": "0x0a8ce4b4f085ac6a79a8b39f7b222db6886d0c17fb220dd9e284c152786de901744929da961d6f4c56f1a9874dc06a92f7481f143e9cf2eab547580e1b1db6181b",
    "signer": "0xe9B3548997c57545A6352D16A021F6df1a01747f",
    "userId": "616597835"
  }
}