{
  "manageEntity": {
    "action": "Save",
    "entityId": "843901001",
    "entityType": "Track",
    "nonce": "0x2e690d4962773234649b7d930393c20e3aff64931b75901ffae6c8a281bdf8bb",
    "signature": "0xde8b74703fff8a0fe1be3a58f0b5cd6f7830fc96b93f64ddfecaa9cd5fef28665bba1a3b8bbfa95870fbe0105797ba9b42e2b57159cfd55effeb45d37bfeb4801c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}