{
  "manageEntity": {
    "action": "Save",
    "entityId": "1914474680",
    "entityType": "Track",
    "nonce": "0x337871a1700d043f0382e0175d1d3e86e8d88e19e541be28da9b37e67f73456d",
    "signature": "0x5501b6b72a0ce40555b190d615c3e0b36050411a072038c59254e930603f61606d9c0eb6c9e401369b5b4a9701a5f9654303a17a062352ab1024933385cd94441b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}