{
  "manageEntity": {
    "action": "Save",
    "entityId": "119840055",
    "entityType": "Track",
    "nonce": "0x83b90b7ea7523d2283e1bb16fae7059911a0b3d5f13663f4d6439457e254cc85",
    "signature": "0xf748974a7f5315922b2582d13a45cb7a305c5af1ba25d8217d9cab4740ab8fa96a32669255c9066ed6b568347069aee2ef6d4bb438cc0b2f888672283b8ce4a21b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}