{
  "manageEntity": {
    "action": "Save",
    "entityId": "613188396",
    "entityType": "Track",
    "nonce": "0x85e6979cef7394563ae0250cbba3c1b5359e7cbe7b5c42cd24ff2373f1e8fb5f",
    "signature": "0x5234ba11a09dfbc382995b800c44dbeb07292efeef07ad02b284a8704a92693b1f0f8f8e204c4fd0adb853fbb8385f8a883d90ee163e629d7bb5164a52d262151b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}