{
  "manageEntity": {
    "action": "Save",
    "entityId": "50386377",
    "entityType": "Track",
    "nonce": "0x8f5c7ad825576d3755985a2d1d3b33689d3de393493eadc687bd8d1fed5f13e5",
    "signature": "0xcb037fddb8b4580a8fe8c6c802f4a88ef26ede8adfff77cc67f00a52546322491eb8ba9d5b7cbae1e90872597adde4453e3f5e500469710c852f474dc543aee51b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}