{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbdf0027f596aa886f1459f192b31614a1eda5bd113214362f6b8f94f2bcf73f4",
    "signature": "0x3d47b9d1fea29e319f3ac4f203f531730c3625e9d0474a350ddd2e3191c276b76f664cad0e708e3c9e0b6738d2f3fa68ad1cb6b123689eb546385ce7502829ab1c",
    "signer": "0xFb4c82bcE296458fa99Fc6643604df291Ad7E3B1",
    "userId": "752746307"
  }
}