{
  "manageEntity": {
    "action": "Save",
    "entityId": "1139304983",
    "entityType": "Track",
    "nonce": "0x18cdbfa68dd8edcc0f74accbf489acd9b12efbcd4a609cd56d1b62c4f9d80691",
    "signature": "0xfaa605126b20adfa37a9f7cf88fa2b2cc90c6eff0a49598343180cf36c5294774fcd85c816a0f8856e290c1ccd965eb42b3af3e94b37c7c75213b2401050cd831b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}