{
  "manageEntity": {
    "action": "Save",
    "entityId": "390094",
    "entityType": "Track",
    "nonce": "0x08c259c1f55c86606a8f6ce853fce30ec4f3128c093a6ae4bd4447214b9e6ab2",
    "signature": "0xd168263ea777d4106b7d1f1a5689e9ab0b5fd86fad288b7c1be1dd327cd3699f37203c8107de9a4e061d792bab113c87c576cb56cbc9d4b572a267d063290e6a1c",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}