{
  "manageEntity": {
    "action": "Save",
    "entityId": "928572722",
    "entityType": "Track",
    "nonce": "0x8385f35a1bd63748ea2d6dd149c3bfd5a7ee09b2eef416ef768bdd2006541faa",
    "signature": "0x4e05a54844df691b408e0765288d47ae9ba648584471dae4be8f558c7cc5c42d632d50f0478bcb8971ab5693bfd24c899f603a0d2c4f41a88570918d65d82c131b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}