{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507165650",
    "entityType": "Track",
    "nonce": "0x2f476c9089e032bc49cb202a4cd137bc952b3a07c93dc689573c11604c3b3e15",
    "signature": "0x7eae3e4b8df4a82cbc7f9edda4337a69e8c31bf201f5625b5aa15c2d3710a0b153b4971206366feb104e07fec45e9d2fdc145ceafe773882c70f5340b94065c01c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}