{
  "manageEntity": {
    "action": "Save",
    "entityId": "926150143",
    "entityType": "Track",
    "nonce": "0xcd87dd5583e5538ef5b99ea47b4143ec747b0cbe601c14a970a4ad8d74a9078b",
    "signature": "0xbbd79917d32d2d9e8267eeee01cf8ac32df8481fbe7f35308cac3b534723640063b5d848a244d43d9be132099101eb1e9204f903d838c045d90fadb11edf7ca81c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}