{
  "manageEntity": {
    "action": "Save",
    "entityId": "722160137",
    "entityType": "Track",
    "nonce": "0x85791a54b02a444e88a691968815fcf8d20ab38e705678dcb38c70b7fa12c337",
    "signature": "0x73bb97417e38e0aa7bf27d7cae016050933d6d4a688c9b29e3952a21a6880fbb1f1d4e71c3119039f7f8b36e11c4593537a53feade0ab0456fe7e898fcfe78d01b",
    "signer": "0xC7f1C5c105933bBdAC0c8A3219204f23AD4f3320",
    "userId": "381638009"
  }
}