{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf1dda3a7afcb840a34bdcbdf0bf48f5b563bf2c726481f48798a2354a29a665c",
    "signature": "0xb6085ac6bec668add97952a62b99be62adbdd5a30fa7d70025217675031f4da87ee1aa1014ab769911dcc757a27ca7b0145758ee7b0e0c75f29e23944f0556af1c",
    "signer": "0xb2B3D446C5A606ee5B3e74e77EE3c96634De4a27",
    "userId": "399675354"
  }
}