{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199702221",
    "entityType": "Track",
    "nonce": "0xad20d30b741351dfae471a1cdba3c4620d6e5f3109b034fc21f6593ae1d8ddc2",
    "signature": "0x7e752be7868f6755626ae4350681eeb46f07f7914d2bc67a1ff9ade4b29e34331b5f9fde8a4dacc7196b21ddafa717e4af0736b127fe02d7d964e29772ed6c661b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}