{
  "manageEntity": {
    "action": "Save",
    "entityId": "554078179",
    "entityType": "Track",
    "nonce": "0x0d090d728db102acf88acb98975090f44b2bffe4a7794ce1d2ae63284c77cc76",
    "signature": "0xca1a79d10bd3d84d7e6d9cb7253dbf0ce4b354ac5cd1b510e8795143bcb6377d09aeede6d6727d0120ca5e231544e99dec322a839efc2cb3b8d629463178c21f1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}