{
  "manageEntity": {
    "action": "Save",
    "entityId": "567104321",
    "entityType": "Track",
    "nonce": "0xb03659cc98206a481c712978992f20e4cc277116e1a9b770cb23e40c4515414a",
    "signature": "0x82deea14b88caf7b1e87adcfe57f76bec0a177905a21c78cd9a8acf323d9fd464259efbe0e5da711ec68ed1d67502a168ce58db1fad32ff3190aa078e52d2d6f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}