{
  "manageEntity": {
    "action": "Save",
    "entityId": "1383638611",
    "entityType": "Track",
    "nonce": "0x3ac4b7ff12b09539ee9c6b784b16d5e31b76786c5d4652ebd11b4bede2d00b9b",
    "signature": "0x2471cca6fd34f7b1667cab47137f3171263b5428fd73d59b0f8307867660acd776dcb8da13c592b1e52678aae2c075c661b38cb073f2e95bbb472c01479fbad91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}