{
  "manageEntity": {
    "action": "Save",
    "entityId": "1292511249",
    "entityType": "Track",
    "nonce": "1786666282636091626",
    "signature": "0x8b163d1cfc32d4226913e2b458c8e4bb1a93e7ddfedd9a433fdd5127d95a046a08d78782463291e1397ad3f4d20320489b8a7a43aab1698cbff742a1a9dc35d11c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}