{
  "manageEntity": {
    "action": "Save",
    "entityId": "685683800",
    "entityType": "Track",
    "nonce": "0xf342c11e4de53283094d7a2a64fc75c3ba438e20bc0431f663a96ec63822f7db",
    "signature": "0x7bed9dca5c3ffcb4b2cd6a5765e2b88e8c99ebf8a289793d55500345e8d0b2fb32285d3f62825eeaa9740cf7997999b182fafa10716f910f83a99fca539f46491c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}