{
  "manageEntity": {
    "action": "Save",
    "entityId": "789130",
    "entityType": "Track",
    "nonce": "0x2b7d7b283c31a269d72384e63aa0512dc7f79663bddd5b00e10cec96ebe0928f",
    "signature": "0xbd3f8756c9d6f42d6bfa1172d6ffc5fd6b8087eb7a57ea9a5e9950e46ee8dc2d67185b062e4953f3f8ebe52ecf4757464510c10695845427606e794a8095a2fe1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}