{
  "manageEntity": {
    "action": "Save",
    "entityId": "1992645709",
    "entityType": "Track",
    "nonce": "0xb0f4f55ab121aa7e200aa1aac97a28c697802219a4c58438c4c6add70c463d4c",
    "signature": "0x90c95d38626ec29a38ce4f442025f8dd456d6172643d4f345dc83e9c590350aa00a46941acc70e2f0571b837e8f3bed975e2a052cf8105b22709cc336072e0f21b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}