{
  "manageEntity": {
    "action": "Save",
    "entityId": "1960897973",
    "entityType": "Track",
    "nonce": "0x3b3c7c3c25427390f4ffc64714fcfd839ca11e5f915d51589b7305f5574386dc",
    "signature": "0x021892c59383ee8ba6a5353f138e2d915975501b139a283afece428ac6fc645979f4674379d1a4c17cdc84b7882227ffd2777e56c4f9245d372894142f91c9061b",
    "signer": "0x031768c05F8AC66fdb9B2516e50f2EBfEc351dfB",
    "userId": "403976571"
  }
}