{
  "manageEntity": {
    "action": "Save",
    "entityId": "1350897603",
    "entityType": "Track",
    "nonce": "0x8878250167dc54f387576b8335c34efe21982de37e711a2d99cdd2ceb88d4fac",
    "signature": "0xc930b75ad596973adafdbaefbc97e4e98224100a2592abe06734d33768bd17e56cf7afa3019631aad80aab4117503675a8f21186402e494b87cf1f8d61ba6bfd1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}