{
  "manageEntity": {
    "action": "Save",
    "entityId": "46638813",
    "entityType": "Track",
    "nonce": "0x1f7de57dcfef9e05c555350ce28d0dc7aa1ed229f38fb2b4660258c0994de9c8",
    "signature": "0xe207134c2aaf3e628e011442519d2eb181a3f7f534551ca049c105a1c4be11f65a6165451c688e91546a77ce9796e65785eb7d808cfaf4a5ad9ce4c7b783a5a51c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}