{
  "manageEntity": {
    "action": "Save",
    "entityId": "1539400152",
    "entityType": "Track",
    "nonce": "0x633695ac6eded890d783726ce16b90f45fca02fbf415cd49ddb633df39505992",
    "signature": "0x5c4fa8a16a87f83fd0deed34c18ae4babcc2a16905b2225044fad1fa92b432094db9abb6b1d741ee0bb58cd165e4389ba7a9aaecd933d32726c657296240fcb61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}