{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5061c70cd65df9a66f68ad4b1c859acb9398ed8900a81695405ecee58da95c99",
    "signature": "0x9ad05e349e2777928205dfe6a6596aef2e0e43024d4d7ce2313b3d4b319aa313764c8aded8391813b13d88a84a9bfcfd1c436833172fe13d269a8ffa53e8b1fa1b",
    "signer": "0x646dCf930B4af805ccBf1e6165f21FCE3A10b9f0",
    "userId": "672317359"
  }
}