{
  "manageEntity": {
    "action": "Save",
    "entityId": "2025940023",
    "entityType": "Track",
    "nonce": "0xf84ff510ac8a4ff0db2c3ea7d551dbc881f3493ad4c7f7c47fa5844ff8074e58",
    "signature": "0xcf3e325dfc3d72201c495ab264490ac48f01723a0ffcc7d2eccc9a51a88b271b03e5bbd11d6a38f8fd54741dddb25ebf255cb59cf27e8db911668f9933acbe0b1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}