{
  "manageEntity": {
    "action": "Save",
    "entityId": "93123249",
    "entityType": "Track",
    "nonce": "0x30fd1f87516db9e9d8d8abeeaa73f8e94f251508e1bbd2ebf96e4f7796c6ea8e",
    "signature": "0xa48f75d5caf3c0dbe0c9e08bb082ed69546aa3dffd1fa026417b89997e0aab484ec1e49d8defceb0f495940345e9bf0b81a732e0c306d69e2247213e0b7a86ad1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}