{
  "manageEntity": {
    "action": "Save",
    "entityId": "611187007",
    "entityType": "Track",
    "nonce": "0x820b80cbf8d7941a9c367223b929fa4e76946837807c1f73ffa65ba75371fa81",
    "signature": "0x990a9e6aeaaac8c84eaa1d60b2c12d216e4af284bcf7f46753e58892060044d24e1a0a2c54fb4d2a312721626a878dbf0ab8e81e18e41853f6b6d7c0cfda02641b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}