{
  "manageEntity": {
    "action": "Save",
    "entityId": "319404358",
    "entityType": "Track",
    "nonce": "0xe011415c2f2463c3e80c83de64e619b2d54aad115948c9f410ea3c65ec3f957f",
    "signature": "0xc8b90679a814ed164388a4d6712eb1710ab0dcc862af2b1351a2b8669b42fdc641cdc4bdc9b08f7a4c687d8fdb3c3aeaed3e7d75037628e7cd1ee5899008d2181b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}