{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x778be4be0b6a52946605f027071a3450fa4b41dcaed83c909296fc6e7c62b735",
    "signature": "0x29b24767874c5ac525ee43dc4b04ff304ed5b4fb604faca74091b74dc512179b7cdc198554b6eb62a57c69e5f81cd3e0527b6440d6aa703244f3238f46156bd91b",
    "signer": "0xe65BC280728eCfe487A6CD19623CffB0358CD861",
    "userId": "582384432"
  }
}