{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674910686",
    "entityType": "Track",
    "nonce": "0xf5d99699dd342f766b3b192f64f9ab538452ce17dd44d9c5b07db1c9a06f7c8a",
    "signature": "0x0d1e1d3a8d56a3feb347aff0320d715d74e86fd290e225a6527f6f083f5b709d4b32438852c32dc11f8b008ebb520f6e0dbc0b34d3c3b681b82bd82bae971a151c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}