{
  "manageEntity": {
    "action": "Save",
    "entityId": "1367995551",
    "entityType": "Track",
    "nonce": "0x021177d60ca860c348de369658b2ba098633a1e8734d0e5691b60240c4b70127",
    "signature": "0x6d43c88c65eed8d7ac26ead57fb412c23fd1fc95aebf5eb99a99e576f009d9ac19083d27dc1aafcf7138ceb92f350490df287e0bd7a69dc562a8945f8b7189f11b",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}