{
  "manageEntity": {
    "action": "Save",
    "entityId": "851447786",
    "entityType": "Track",
    "nonce": "0x345fe94f0ecbc874f7de320d2a8eadb06f8a8bd5dfc021bc1e8833c35b5f82b7",
    "signature": "0x5c736c9899afe3b3b68c17d712212e943fc4e0ac4c194bc8c410a4fef182183857afbfca4d1cb7ca2778d603e5a45e11ca24da33dacc5dee84d2e792bded7da71c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}