{
  "manageEntity": {
    "action": "Save",
    "entityId": "105058699",
    "entityType": "Track",
    "nonce": "0x5bf11772e27260dc841a0f8b1f9d02060eaa0892350a78e13425d0911d178396",
    "signature": "0x8c683172b8d8fbb71df6de0359e200fd7792202a7bfb68c4793abd508814479320980afeff8646b4f2c82897d6efec8ae4e1c8fa062e510aeb97360b0afba6f21b",
    "signer": "0xa00b274fbA8B0F11566dd9430f445De1c368156D",
    "userId": "779011370"
  }
}