{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x44938dc32895a30ba159d65d228c6d7108e93e6520450dfc85d307a1832acd6d",
    "signature": "0x40e00137d3ed01220c17f98beb7ee29bf67bf75f9048032c953527427c9a6a2e33fafca9160973776d543f33492156723da587fb95cede2615d4d043255f8b661b",
    "signer": "0x8676C975d4E7ef5976067Bd6Cc943423B6aF38E4",
    "userId": "546545101"
  }
}