{
  "manageEntity": {
    "action": "Save",
    "entityId": "826832691",
    "entityType": "Track",
    "nonce": "0xbe66ad303ad85bba6edc199586a2273ffbf429448d54d21aaa71bb9092797788",
    "signature": "0xbb8e31f3a33ebc1760c8f11cb87eb867324440f05b6a52f9ee0365390754db58696238041e2295ed61694bbf5adbc6d1d53c0a8791572b2ba6c805c7a36131cb1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}