{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530917900",
    "entityType": "Track",
    "nonce": "0x08b8f0f709ae9372e17722a537a3cfea4e55debf8b89623cc093a4b8bf88ceb2",
    "signature": "0x757cabc50986615451ad50e92af79f222f809f7bf361302f42beabc0577696042238a8f44928125bf881728d4cbe8c141b5fbdfa9453b727bd77c502c3eb71aa1c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}