{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385946807",
    "entityType": "Track",
    "nonce": "0xe21ec82274753d487cdca2850b042ebc8f3badb63638dc460d35f97a8d946ce0",
    "signature": "0x38b48d8cb104606177e07d13826af90be9c5ca356a7b2e5531d45e511f4d33be01faaa0565c7566134918e0b5173a3b7e6ca9d3eb89bfda01a9d8e372a0f18141c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}