{
  "manageEntity": {
    "action": "Save",
    "entityId": "736869272",
    "entityType": "Track",
    "nonce": "0x9d30a042fa93c132784afdd3fe127fbc17d4e6542ada29242f8a873d3a0843cb",
    "signature": "0x96e7330d1482f1aaf400eb1c4cf6e0249a6a22e8b85668777e774634175650505b3784252a4f42c29a8e9c918124e222cd6fc8934c30cf52abe9a853470712ed1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}