{
  "manageEntity": {
    "action": "Save",
    "entityId": "904882366",
    "entityType": "Track",
    "nonce": "0x04ffadd484d3de22d381b59eb6c9bdc891704ca2bfb0b027ecd79f8d4539a92b",
    "signature": "0x8252f46e2a28077853f49b483d0275e6a258a3fd0dea6113fc8654b818c2af367e7421306b550325416181da4830e59229a789237a36a18fff6437c8c83d1e0c1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}