{
  "manageEntity": {
    "action": "Save",
    "entityId": "530959024",
    "entityType": "Track",
    "nonce": "1792315636524506852",
    "signature": "0x45ef0e955f0b38e720230df1d04a5ebfbeae586028732e306993cdd20edfb7cc7ab1950af3556466085041dafb22b298ff5e7629c24b2c681d9ce9b7b8ab15c91c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}