{
  "manageEntity": {
    "action": "Save",
    "entityId": "1650557768",
    "entityType": "Track",
    "nonce": "0x1079d7e6b56280f8bb868bfadfde89d271e5070cc77838c571c8c4828e0a29b9",
    "signature": "0xa574e6c61ebc0e4d0129bb553043d169258e72546de8a251d3e1a7b066b4d5d376ca2fa5de71888e357ed28cd868636971e3c0c57cfed8d7e0ded6cbfb75fb941c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}