{
  "manageEntity": {
    "action": "Save",
    "entityId": "173054683",
    "entityType": "Track",
    "nonce": "0xac4cd7311bf7b70e1494aa69b84d610d32b7cdb37a6e6e7a2996048e65aa950f",
    "signature": "0x84fb7d8b49bc5baa033a4a3455b33a82eb4c820d4a91d55921eaebce3bc2b5b23782a2f682e3247f3bbc9a96d62ffd5a67b536ba17a7b6b1d06cb0d7f157939d1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}