{
  "manageEntity": {
    "action": "Save",
    "entityId": "214779",
    "entityType": "Track",
    "nonce": "0xb0a4b635a89ff4aab79315506afbaf76dd14aa2c19b7bba96daeeab6686b40a0",
    "signature": "0xab4ca36bb065cfedeed2a9e422736659594072aba1d5ca5a76020d93e5aa033f6c0aa95f4ccae0d85be24bff41989ffc62bed55f629b439c381620f335a76dba1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}