{
  "manageEntity": {
    "action": "Save",
    "entityId": "460282622",
    "entityType": "Track",
    "nonce": "0x7d454aeb2c0dc8a77938c84cc3072e732f3f0c9f716edec34217826f4a7ed46a",
    "signature": "0xcaf3b7de8b656626a587d76fbdb8e07d273e4c5dde7481e0a19202c01d505dd35ba99d6b31727654c06948b9d6c804271f486f24d43646507002cde4867510991b",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}