{
  "manageEntity": {
    "action": "Save",
    "entityId": "185434",
    "entityType": "Track",
    "nonce": "0x5720262aea30611e7bf081342295ad1407e468e86748d13e318ef0aabb8b6433",
    "signature": "0x1095e3c8de0b370bf5e2c569c50a16bc6a376d851e260832bbccb664b0eeea8726ccd4c87abbb14aee9268080903a70e9763eea9d0d18d9be682ebf0607beb2f1b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}