{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304671992",
    "entityType": "Track",
    "nonce": "0xe04523c3deb24a0fcf94995c76749cb74af067e557017f57f41be524a88454d9",
    "signature": "0x81dc87327dead02826728e57f3d7422083945490fe26f999e12dc27f4b105dd2337742bf50d2a0af039612043ccb9a7043fea230fe4b6a350cf83140700976841b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}