{
  "manageEntity": {
    "action": "Save",
    "entityId": "1965845422",
    "entityType": "Track",
    "nonce": "0xd3fe99f026bab757eaab7b1639a19c1e0f6853d0baa0f1d6850a370c31483ac1",
    "signature": "0xaf2c0c1295f0d701c20e6f3c596c824651367c372d09d1d8bf744eb0ff7dd3116da11edc18eb94cd6e60323bbd331ca4f82d7e256b07f4696ee72e9918c6e7d61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}