{
  "manageEntity": {
    "action": "Save",
    "entityId": "1362442490",
    "entityType": "Track",
    "nonce": "0xd7de5e7d5d5190a365d0b0148d4e9b6d4d536fda98182be63d8dffc0ebaf4004",
    "signature": "0x6953e3c6de06ad92e67a294b2bb94ddd873f8712ccbe73e02c2adb18e2adbf561ca6339bb6663b1f31d1636305f319461b8176c1cd90f9139db41936e6fdd45c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}