{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x66182235bbe174ae7bd2a2027f5e0f504cacf5bfc9e252fcdfed80c49b94e607",
    "signature": "0xd83d59c65047f0878a2b912b9aa0277435834d1c2d8387240a8bc4efcecc22ff15f9c3a2f4adfee8d7056ce2b6f2994d3d7f6901131c763a2fa31162a2d9bb921c",
    "signer": "0xb9de00A4EE6BF9B02D55cB9baD4e80fC26cCfB8d",
    "userId": "144945188"
  }
}