{
  "manageEntity": {
    "action": "Save",
    "entityId": "575823",
    "entityType": "Track",
    "nonce": "0xa3e78c4dc8bb9e13a32663e7fe964bf15b389ece0a8905474b9b55a1c046e85e",
    "signature": "0xefbe2ce9e7c7cb3cd1f0b4eb55d4fb13e72f59fa6b5d77285173334ccc9315e332e9324706e8b6dad8d723caefd64ac8fab435b99848e438647747e9f9c74b6d1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}