{
  "manageEntity": {
    "action": "Save",
    "entityId": "124989508",
    "entityType": "Track",
    "nonce": "0x3a7446169c138d6630a386f33c6f5d7c24442094c53744d7eca6c5737956ee92",
    "signature": "0xe00098aaad1c77aabfd425e893e6756a68e67112c43964ff0c2418328ed8cb7a5c5498cbbf85627efe4df074fc408bad2ea880118ef171b564ad94b48f12bfdf1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}