{
  "manageEntity": {
    "action": "Save",
    "entityId": "1532475953",
    "entityType": "Track",
    "nonce": "0x3aa926b8a32f0f3f3993673ab48d18a289d454ceee213e698fef119ee400378f",
    "signature": "0x6a98ef30abf0e1ce73fc660d0fbab23d6fdfd5c52057dc7a31a918d38f5868150c08f16062a7ad6248be126af7d4fc13385a62d76e1329c0f5954ea041a89d691b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}