{
  "manageEntity": {
    "action": "Save",
    "entityId": "306677423",
    "entityType": "Track",
    "nonce": "0xe81d982efa30a36993b04b29ed370d0b775baf7ea062d73abfd3bb0d867747b3",
    "signature": "0xce22c3de795a9c4bfaba6c313545fbd3f3bede756763e7f9210ca63751948bbd643a4520d6a3aae15aec1a030f7c297b34ee0506ad843b83c91975064ade65d41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}