{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703551439",
    "entityType": "Track",
    "nonce": "1787899826874458553",
    "signature": "0xf9044a9862384c6589ec3c704dfb8b0f4b7e7fbb27ce42cccc56bce5d030533343c5b59fa9909dc77794c0e4f8dc920dabd836734f5fd81b216952ad283db9de1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}