{
  "manageEntity": {
    "action": "Save",
    "entityId": "1602164937",
    "entityType": "Track",
    "nonce": "0xf8798e4cffce6fda9c9f0cfe57a5bb8ee5484b7560761b1623e24393ebe48f2b",
    "signature": "0xed925d93cbfb47ff6897c0dff8c2d0d4b9709b872dc2cd50ae64bc9ac207c8ff4750abd4db30bfd1570a473cc9f136ff0c2ebb47c8073cb8d2d05a6ceadf34071c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}