{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677311676",
    "entityType": "Track",
    "nonce": "0x642fcb8e82cb59151e04d184f9ccb91aa144ea883c63ea6105545c99c1e4568d",
    "signature": "0xed882929bb6bcef9ff977cfe9aba5fa69930935e0a3d24eae9b47151d1f917c927b47e4c8f0bd8cd6724cc1e255453de0c8abccc82c353092d4ff5a360adcada1b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}