{
  "manageEntity": {
    "action": "Save",
    "entityId": "942676045",
    "entityType": "Track",
    "nonce": "0x9953490b6ff47ed68a4e8d5439477e977f74eb50da24777df3ef9b704f460ef9",
    "signature": "0xb14f713b1c274429f807aa712fd5572eafd6875589a647dd3fcae3fcb82310515dbc723a0662e626e9e5a396c22004d5507ffd48cee109bfccf594abc0958a371b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}