{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x87441d14bee80b6da942245a8c43fca8d84db01177b44bb43d53e5dbdade8efd",
    "signature": "0x926652bd4756548a42178d9f62aa8922a6648d4f0447551d1728dad29dd40f465d81ea06928db873822653c7594a8373c8abbfcad0531f9755587e7b63b2661f1c",
    "signer": "0xe132cce26494B66aEc317d4fE5c6968d8fD00013",
    "userId": "549786182"
  }
}