{
  "manageEntity": {
    "action": "Save",
    "entityId": "698285778",
    "entityType": "Track",
    "nonce": "0xd392280b373db53a765b74d6fe4adcbf6a85fe9f1735319aa47344c1686876f1",
    "signature": "0x5b1634b5a599d45d978993014f373ee021a3f69e7dd51c2be1cc7acacd2d41d24669728465ba8873ecf674aa8e217cc0f231446af937f5930eabdc68b352104c1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}