{
  "manageEntity": {
    "action": "Save",
    "entityId": "1279816479",
    "entityType": "Track",
    "nonce": "0x5c92699dedcb96e25cdc5c1771c2b6f71c2959f47a04458f208473baf46c6de4",
    "signature": "0xae905e8b972575c60b7d713d3e9135193a3cf707c75fc586c579f1c03b39823e5a5b5e7f29e9570c528f122d7b774503ae47b0e8d9ded963c62a5bfd11901fef1b",
    "signer": "0xf955397B294667924e7Bb7F0242060CE42339111",
    "userId": "142071420"
  }
}