{
  "manageEntity": {
    "action": "Save",
    "entityId": "209494104",
    "entityType": "Track",
    "nonce": "0xd3332cca870ef3c5b0bf10f13eadf472c1174e6e11c30ed44c75f322f72c9e91",
    "signature": "0x54898f331bb4f08f6f735595aa7acc17a6bdb04d59779d511aafeca8f84c188168549340c3b022be0f712f5dd9dfa2588b7b9d8c0a9e19339395dc91cf5f1a4d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}