{
  "manageEntity": {
    "action": "Save",
    "entityId": "1541920039",
    "entityType": "Track",
    "nonce": "0x619cee9fecabb096d9f4172b1e51bd365b873510859691ad348c4003b12cba3b",
    "signature": "0xdefd4af2e3e22fcfb8f6f1376bb7c9dcf29bd2590a61178fede0efa0c4b93a284c8acef635d53ce5266b879715a0875590242468f031b6d2d7165c5444cae49c1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}