{
  "manageEntity": {
    "action": "Save",
    "entityId": "2102178466",
    "entityType": "Track",
    "nonce": "0x564ee2c8afa0ecc57d56b30a1c83d1f9b1693d05622957ba1833015adb19da7f",
    "signature": "0xe7e5d7f31f0f62d4a49ff8e287980aa2976c0b75d4362518dc22f97b611c91b85e85368b4f9430cfd0e78eb224ecfca6115280e7bd2baeeb5104b7c54c21a8581c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}