{
  "manageEntity": {
    "action": "Save",
    "entityId": "330379",
    "entityType": "Track",
    "nonce": "0x29b6ea38ace5cf7eccb492759c570bffe0098f737112b456e41d4b348f2df144",
    "signature": "0x37cd9ab11607d885e9aa2ce311a66648c64d3359f6d80cb41e710510edce927410b78921a7e709fc6dd52dc27e28a7563554a62433156dfac4dd9a8b6ecf60a01b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}