{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8b170f1b31124c6f581c9a549beda80677f488a0179b37ec4c8ea1c5f3225042",
    "signature": "0xd6f8da946712e6ebc0986319f7d9f973eaa6ed59ae642d32b9277f0d5de2637a2cc0421eafd28255ced388cefbf3810451ea6887c5985be925c1ea0309e518a11c",
    "signer": "0xB19c29B442EB94Ae8176a376e19523532ef341DC",
    "userId": "906078737"
  }
}