{
  "manageEntity": {
    "action": "Save",
    "entityId": "534478",
    "entityType": "Track",
    "nonce": "0xfcfcc634fcbdd31597f7ea1404f263f91bb6cc900b67054fae63f90a62272dca",
    "signature": "0x4ba301e05d200f993ebbb1b23b87f3f15d1ebec8272f151b62fc3dd8585979bd14140e454c87565c8649b5940b3130875a17f16ab6d76f52e1484ff31d5d55fe1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}