{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595331283",
    "entityType": "Track",
    "nonce": "0xc15ae5fce2b2018e068eb36631086c0124709f4c8f06e17e52fe05b399117ea0",
    "signature": "0x29813cbaca4c7004af600f6047976d08b8d4735b434ad9e6dc5eda34be615e92507c62d9689707fa003db7a6159d0c13e9e9a450d6cc4d5ec026cbac96b409a01c",
    "signer": "0x766d742Cc35188990Dc38CaD8006DEcEe3fAFed5",
    "userId": "353834"
  }
}