{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341538858",
    "entityType": "Track",
    "nonce": "0x43b5070adbf248cfc3dd403eb0bb174304115d52447a10580919a57f28e308d1",
    "signature": "0xf9eb90ed622ae184deb5da2727972642948d66ddda996daf90d3340364195ee7296690ee0708a382534b7e54f75a85c4af4b52fbc9e42c93d87531f79b279b931b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}