{
  "manageEntity": {
    "action": "Save",
    "entityId": "1035296910",
    "entityType": "Track",
    "nonce": "0x5244cec7a9f879a6d50cc243d5dbeca88967cead6555337230766b5b1ab5a495",
    "signature": "0x34ddfe344a0cf865b9b4fb6492efd70965edf0ee41644c592a39eee2aeed884762dba97330e1519cebb56cf3476709822a258791e8de5af3ca6e800a6b3a619d1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}