{
  "manageEntity": {
    "action": "Save",
    "entityId": "54045213",
    "entityType": "Track",
    "nonce": "0x3e85ad37837553ed429287b9e7caa5da768762f0c16be29c70adb3912fe137ee",
    "signature": "0x8cf437d0d8f1c124e7b279806e852d0558f22527955579562240edf31d59dbfb68cb38be370cea6125cba9b5e3b9232c9660ec980797bf862e6987d8d2ecbfca1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}