{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844699306",
    "entityType": "Track",
    "nonce": "0x504894d302ea8deb31ecd1431bba5a2736a8197c7032383971358054c895e5c2",
    "signature": "0x13ca60073ffa4edccb362630ea0af75b22bfc9145af3bfc910a9c77deee48d62463f00784f564f47f05f31f1d2afa9f4a8a2d4d7a9ff0053b197c268773942ac1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}