{
  "manageEntity": {
    "action": "Save",
    "entityId": "159641",
    "entityType": "Track",
    "nonce": "0xb88beb6018e5fc51c44b2e1b7c33f8a77e26f06a2581c66a5135df682c869905",
    "signature": "0xebc49f2bf7b69c77e02faaad7b2bb51e5a2abe1738a437c565398965f74d5eb16841ffa729008488b2bc99883cedb0d614bfe7cee80b31ea42eda15b6b52df1f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}