{
  "manageEntity": {
    "action": "Save",
    "entityId": "576092",
    "entityType": "Track",
    "nonce": "0x46e61737416cb7d891b248d5622bcddc42ae09d25f768af94451f26a94bb6235",
    "signature": "0xbbac57b21f8767c89612b5814d2dc294fb7b2efeb8cf5ab0ef648e0e88361bc02afadf8e352ac0938cf7b4f24bffefbbf103ac847dd5cc08c1cbde8f312c145a1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}