{
  "manageEntity": {
    "action": "Save",
    "entityId": "994689",
    "entityType": "Track",
    "nonce": "0xefc5b8e53f8b8a744cf44005f89fdeb85fa641425f65d5811f45027a1cb49c6f",
    "signature": "0xd79ab6045ec1a9daa01a6393a408c4fecba48ccd07a1f24f895e7a0c088791226408298cc2896014ccb993d94db76d3f2f26199829281d2f86a35af361d225e11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}