{
  "manageEntity": {
    "action": "Save",
    "entityId": "2103014695",
    "entityType": "Track",
    "nonce": "0x9af1b6d7deb087866160f72ec1eb895240bb327019c75f91bbc3b99697f9e235",
    "signature": "0x0a580089967efa796a64f53d91638a3668af2e7ccf60ff3c1ff07ccacf47bf980f7a2e95b8a667d635ec81f63864944a624d725faa6b25057227af9ffcac76a31b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}