{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x82666ecd7779f5513ca6024702b25c2d4e0a832817327fa6e1a9260e8d2e3dc1",
    "signature": "0x02e2dce4318f3359c8504c083aade7b65a0277ef778a939d5b23582ddfcdc90772170998ce98a60ab38281deaffbd9c2bc63ea94ee82906c535aba98c52826001c",
    "signer": "0xdc13E26540047CCB9c3E2F99b9ff2b7DCd0Da018",
    "userId": "350077186"
  }
}