{
  "manageEntity": {
    "action": "Save",
    "entityId": "332853",
    "entityType": "Track",
    "nonce": "0xef14fdb91795c401a620cc99a87821bece61f260cf0137f1ec9ac8187bd92906",
    "signature": "0xf2dacb581fd257de8c0976d668b9a29d56a277ff86d3bf346b0d329af5bcfbec7c1ab034c7fd01c92fecc94db4791a04defeb9522974d2be270cfd68da7b8cd21b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}