{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045783296",
    "entityType": "Track",
    "nonce": "0x515efce0dc46e7be130ef8607614946136a589e9ff4643ab3afbe8952e1919ee",
    "signature": "0x2eb899afc2dc28650e249ba95c31e38c332adae0fff4b9504f8653c79dc26ddb04930395a5e3b52caa5320969fa71ba7e0706ad0953338768a543f1185f0b90c1c",
    "signer": "0x50052Cb40B021471Cb5889C1Ab69fA335871BE41",
    "userId": "331788639"
  }
}