{
  "manageEntity": {
    "action": "Save",
    "entityId": "663050252",
    "entityType": "Track",
    "nonce": "0x3191abbdf0998b3ab032e44af29598700cc2994ada0aed24f08ef04348994363",
    "signature": "0xec8aa5fd8c922d816018540acaf69771b1e6c61028b5d4b4ad1b2949c3ce23be4098c0f3c99edb7e5bd3074354f98d6045b678f63113ebe06aeffc516eaed5f81b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}