{
  "manageEntity": {
    "action": "Save",
    "entityId": "911798333",
    "entityType": "Track",
    "nonce": "0x549c26436633e825cdde018ce54fae21b5633f8082eb74e550ceb52d040973a8",
    "signature": "0xc29f42c0568d5c62d4680a73fd9f29ae70cd2e2c9819b4a845d32755adc3757e7fdc32b3a6573fb5d455fb07cf04fd3fc4618d0b822036c70efe2cea253cd6c81c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}