{
  "manageEntity": {
    "action": "Save",
    "entityId": "1681223935",
    "entityType": "Track",
    "nonce": "0xb1d6014806e1fac4c8c726d1d76fb26c5d68b201e7ac42ef76be094503bb65cc",
    "signature": "0xeb61282286c690f82dc76310ac6f8627d9b64bfe2e608f2a31d741ad6982cb93753cfee657ec541405e498ffd8e4bbd8c0a184aa7579494695a8a0173c6928ab1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}