{
  "manageEntity": {
    "action": "Save",
    "entityId": "1534863914",
    "entityType": "Track",
    "nonce": "0xd60de020cdebf20aeeae2a055319e8a10372f51309885805150108890e1bdac3",
    "signature": "0xd14f0039c85586b9cc18510919703e026639ad0c0d848e34e290609f1c96e65f10ea40ea22f60751c35e57f7e449a9376d96c17ecf0bd273f3e49768d0a1f4d21b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}