{
  "manageEntity": {
    "action": "Save",
    "entityId": "235912",
    "entityType": "Track",
    "nonce": "0x975cb7f72a2dcc02293e3424a4d23f937280f20d8da1597f71f1559edb4fd820",
    "signature": "0xeaf6e93aad922dc8e8febfbf6fd133269de31eba2b8842e96987ef4024b47483497c4b4fbd40e484d0b29bd21068415ae114c55fcd233fc9bda6038bf653fa451b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}