{
  "manageEntity": {
    "action": "Save",
    "entityId": "568265876",
    "entityType": "Track",
    "nonce": "0xc5e41a7f0c37b535a1066528c1f857fea9752d64e2245438e3d9d599f2236469",
    "signature": "0xc341f5153f6fe0fd7d8a7c79efe3ea62e11a06b3a6cac8205e00be7babc7027d7dc62c8bed8529add0153f2a9a94975dece498c8b8038a076ee2aa8b7fe12bab1b",
    "signer": "0x27eB4b469aE053b72c26B3e9c68a655390Fe24fB",
    "userId": "42216"
  }
}