{
  "manageEntity": {
    "action": "Save",
    "entityId": "1298065990",
    "entityType": "Track",
    "nonce": "0xa6abc416d0346693ef486415309e69e522a9fe643327031cc583a01cfc3d37c7",
    "signature": "0xd1eb558c4221da35c68a2d969e7ca8a4cf9df6a540f79a5076f263847b6e618837076ab42ff7ca9825aeb8bce73d5c6568aa0c4640204de04f59b7c96ea2965d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}