{
  "manageEntity": {
    "action": "Save",
    "entityId": "188960959",
    "entityType": "Track",
    "nonce": "0xe600ab8984ae58d03b56d2c49041bbc4124b5030a756e5ff6b7ddc319e035f62",
    "signature": "0x6772dce9ece5cbcc7b5244d4b96272adbb99076c80eb41c22e024a3ea2af1ee459e11c1bf46e6f9a3038aa5e702fe498ed63028a43527f495e1aba712d9804a71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}