{
  "manageEntity": {
    "action": "Save",
    "entityId": "1095722589",
    "entityType": "Track",
    "nonce": "0x2333b4c666a316fe2dead8f060e46eb53bf4ed35842a80a9bc70a2a1c5dd7c53",
    "signature": "0xe50c6859b5f0473268e78f64d977abff43eba099f2caeb8240e6bd23bf4cf0100eaa2479e9c81177a2cb0bcbe9061add2647710b9cae666deecd4ed0ade0b2051b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}