{
  "manageEntity": {
    "action": "Save",
    "entityId": "770237",
    "entityType": "Track",
    "nonce": "0x4dc81411d340f475c3be9b298d09e5503a8d269cde35cc483bf83c6ce79a07d4",
    "signature": "0xcf6f28c4b8b1e000cd9f1e0f334c610cccf1c7f943c8286567957bc82a5204cf08a5c4aeec2bcba51fc2cba4ca048a77e0328713fb36d1d31d57c7abce687fba1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}