{
  "manageEntity": {
    "action": "Save",
    "entityId": "842388740",
    "entityType": "Track",
    "nonce": "0xe79edbe6b2fd2ed11ba1b13da7f2458fefd7b9e6c487a4566177b559abbbceda",
    "signature": "0xd65ad756275c77419153aef3f4ac39f2105e91e1f05878c2ceac76b4ee0866403a6f6a905d10172a289065024b19ade96948d7b5cd2d1d8c525436023b209ad01c",
    "signer": "0xab28764Bd1224556ebA1d8Bc48d3f1F5D2e4E1dD",
    "userId": "281054123"
  }
}