{
  "manageEntity": {
    "action": "Save",
    "entityId": "377539399",
    "entityType": "Track",
    "nonce": "0x57526ddd8d14217038271ce37efca5617134df9dbc99ff2b1ab2e1bf6688557d",
    "signature": "0x9f5137efaef32cb462f01036233f7799005cfe4833da61cc1eb0527d42b06bb32e2a71bf730594e6898accb99f8d0228b5a0162c74117d680a1b4d6ecbd710dc1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}