{
  "manageEntity": {
    "action": "Save",
    "entityId": "125769",
    "entityType": "Track",
    "nonce": "0x6ae1cbdbd2c761909c5c4da1ad1e8b85769998d25872e989e01805538cffd9ed",
    "signature": "0x86eeaa4868a906c10b35d10a2ce782c28e05eda7eaa5525f077ae9d4ddfe0a3b1038cad5abdf3d1521db753895549dbff37a476541d0955de2fc6d8c75e3c30e1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}