{
  "manageEntity": {
    "action": "Save",
    "entityId": "85755171",
    "entityType": "Track",
    "nonce": "0x44ce5b49784454a9a77897c30ecb8227bf7e985af908b6746089d68b8acbc1e8",
    "signature": "0xd498e7c90a4cf34009c00d2f8d7e984bed6af5c96a8819c2446cbabb0aa6349b3a92a639d554957878224f10355afa2750aa92bbc146f45095c0853f0425b41e1b",
    "signer": "0xC5d7D604F3E440992b1c54ce53606054Ed801ed1",
    "userId": "104431393"
  }
}