{
  "manageEntity": {
    "action": "Save",
    "entityId": "287836808",
    "entityType": "Track",
    "nonce": "0x11b4c6df3e00c9350312539ec136f118caac25b51f82f9749c0daa07108bb8ad",
    "signature": "0x2573c6a79512a3cc59bdbf65395c9de6b71d03e84aacc7e3c0da140b5381d01f7604ecfe6983dc8fb1f1427e1a5f562996bc88e025905882c707ea5728d9a1f01c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}