{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbefd9e6a232d1926943f2ad47f7ee63c4f8121227d651698a67d3c77cb25fd13",
    "signature": "0x7b6d4b3d81788a4f7c5621eb756870c4610f30c50a9a12bfe3797136e6c4cb97199ef2c61b6b11f432a8fa8eaf0dfcdcd21d2cc0a66717747520d63a748c987a1b",
    "signer": "0x8aB7d23D8c6Ea85540aDABD8Ef54b78eDDF14A7B",
    "userId": "709218456"
  }
}