{
  "manageEntity": {
    "action": "Save",
    "entityId": "368407",
    "entityType": "Track",
    "nonce": "0x0ab3a4f2b4f802465e1bb7bb38cdfc929cb8a8dd0ce1b65e50fb0e10aa06412d",
    "signature": "0x17597210c316b3c7564075ca5311eb66fba57336d25095882de8c690996033b2272a1bb74e154d246e108d84496ff3d815b095eedf32c134831b8e145deefcfd1b",
    "signer": "0xFDaA8d18dA975819Dff816CA1A274097f8a72c16",
    "userId": "36320325"
  }
}