{
  "manageEntity": {
    "action": "Save",
    "entityId": "486315",
    "entityType": "Track",
    "nonce": "0xbc64711e06ccaea9f17121c1fde0a7855f61bb7389a22e37081cb457027488b7",
    "signature": "0xc22e3530495e4d3578772c5f3c9bf089a4ca307b37c629627a1708c32f6ce19a07b88d74c1c10b06425cb199f9794b4fc39028e818c00ec509a4bca5b3cfa3ab1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}