{
  "manageEntity": {
    "action": "Save",
    "entityId": "1488811528",
    "entityType": "Track",
    "nonce": "1780843194313484845",
    "signature": "0xd7b7c7e977e883a473f541f4a75e7dd45d5665f454719b6bb30f860f6cb94a4232bd3a7b7174b1fb2a76065212bce46f563825aa7a8d4c1a0a23eefed315ccdf1b",
    "signer": "0x286E7ad8f9447D0112953Bdb1684A4b4192ECb76",
    "userId": "210545"
  }
}