{
  "manageEntity": {
    "action": "Save",
    "entityId": "566047154",
    "entityType": "Track",
    "nonce": "0xf9c32a265e49400e61c064bf64c8968235e7bf0d9bbd4858e27fbe7fd83c24c5",
    "signature": "0x753fa704b9bc1a956d1ebe6d3ae7c40b7244406c8702de263f477b3fc6bdc79b0c8426ecf25706782b3a438416bdf9f5e3ffaabb01879b6631842233e472c1db1b",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}