{
  "manageEntity": {
    "action": "Save",
    "entityId": "1357326957",
    "entityType": "Track",
    "nonce": "0xce7be884fc06df1fc85a81c3515ed8bb63235f045a08abc78a35983bfb86a727",
    "signature": "0x760d37bc2034bd8648e934aedf3f8d3240805b0da21e5ede223225fcc60811d4214a862aa8695abe15682cf41ebf9214a77c3b7298ea5165dde60b9e7736f8961b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}