{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092129833",
    "entityType": "Track",
    "nonce": "1786246489442483367",
    "signature": "0x60270025261669b59ea4992c67f4e2f397d178c2725c5f1983d7589994f709861b4d4061345cbfef753424f84c760b7b517281de3128c2b7114650b50cfd8b691c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}