{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa703d1014eebcacbf50513a453469fce89cb3980d26b6cb9bf6891791af6c4f1",
    "signature": "0xb806b429e4a63221a4e4c0b75319e70501ffc743d6546842dbc063b6abc337fa159c18e960e0a771b51940294879a9344eeb755e2174b62d3e592df5221cdf841b",
    "signer": "0xeba209eB804B902811A8C9e3483f38e2cbeD16c6",
    "userId": "205220626"
  }
}