{
  "manageEntity": {
    "action": "Save",
    "entityId": "607079606",
    "entityType": "Track",
    "nonce": "0xf408615d921ce8d8f67fc11ab0c6bce1cc6653850c7aebc14c301b239532c264",
    "signature": "0xb3abd1f912660bff1b6b5998d353571e674cade034d3f815804e4e40c003c18a49a4db0fc90585f949e3f9d520a300fca3a4701728a2d40e4eaf40dc3fec35a41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}