{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625828223",
    "entityType": "Track",
    "nonce": "0xcacdf695b8a2cbc7ab670fc5dad528fd6a2f1770f59a19372105a54d5f549f20",
    "signature": "0xc0e84275e9a9c77b69d7788e8b506c311be72ca65dd331d038704afdeaa8c85a373c3db2e4a70613266582ac4404af483ef4263dacfe4414cd7d2ca6bafcdb161c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}