{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930885251",
    "entityType": "Track",
    "nonce": "1786316580145681412",
    "signature": "0x122c5e80ca670585a8879d44522d3ac61c88037a881014ca0cfb503e27b477bf04436794329b4ae22e91c21fa6dbb9e454e9dfa21faecf40c6c1465d7e92b7ee1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}