{
  "manageEntity": {
    "action": "Save",
    "entityId": "346114701",
    "entityType": "Track",
    "nonce": "1787139925472101484",
    "signature": "0xc697572f0318a41b8c07411c24010ea7b3d40033668803fdb2d612d99108dbc2176287abca3c29b7d1f55d874fff5b53db952d081f03dea987e9834b49ee605d1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}