{
  "manageEntity": {
    "action": "Save",
    "entityId": "330046",
    "entityType": "Track",
    "nonce": "0x3db4db83c2fb8a9d32587d6de852512850eaee53b1ac70cf88fff12e33a952a1",
    "signature": "0x291b3e0a11ab30e5f186e2d35533e5def96ab5105b2c7d36b9a13402132a20d255d04d273e43878bb20c7f9ca6e24bb238aee7125c9c131d5b6f057a0836e65a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}