{
  "manageEntity": {
    "action": "Save",
    "entityId": "1488792339",
    "entityType": "Track",
    "nonce": "1792109469539169029",
    "signature": "0x785d5108eb5e9becc992b7b13cc5e62266c2419f3d5ccde3b8f97970eac5e28a7920f9efa433bf869ae321da2a6d9cad644a7cbfa412dc063aae8d041f08da091b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}