{
  "manageEntity": {
    "action": "Save",
    "entityId": "576672",
    "entityType": "Track",
    "nonce": "0x7e0fbada125d015ba4a00df89f1e741346555014f4838d3cbac62d424eb1d465",
    "signature": "0xccf7fac8378b45dddfd81d87c82f06cbdb91cc9d9188df45a5c5f1cd8e7faeeb6374e6ee3751d796c9089af62f79d79dd7b2e239cd2ea22687ad5b03c64564241b",
    "signer": "0x4035F5d452CC9948745788eccD1cdE1c24128fb8",
    "userId": "778966977"
  }
}