{
  "manageEntity": {
    "action": "Save",
    "entityId": "1655175354",
    "entityType": "Track",
    "nonce": "0x8ddde38e6f0f3f121906cf55a0f52a158cd513b93293980ea2ca5f110bca4169",
    "signature": "0x9f7aa4824523b573f10b5420e16206d6eafc7a4694b6673d5e3e2f07fbd611260b4e699149b31207d68b92e3e300163b95e764d5d0453664ddc8086ff6d8e5921b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}