{
  "manageEntity": {
    "action": "Save",
    "entityId": "692958",
    "entityType": "Track",
    "nonce": "0x160c928e90729bf6409376871bc9a3abc0b2b8fd1ee6f521319a9df2e4c192e5",
    "signature": "0x8544c8f71c4c26fb98b81a5498b0e3a176bcf3804989e1da85a00e3a3f9a6dc02f22523ca5106a051c2f2f34eb321151c5cb90b7752762fb27d3e9fb42b437b51c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}