{
  "manageEntity": {
    "action": "Save",
    "entityId": "1727431923",
    "entityType": "Track",
    "nonce": "0xf97ed0ff7abddd91eecddd835ed060ae324c2c66db8542e0a32941a12a142dfe",
    "signature": "0x9f78fdc2a862a1afad072bb8532d9163827087b72976353b4f4b1aff9eaa5bd32780a4653cdaa7069a7cc428b0dad50ef1bb97c9210824c7b0b1db6b58174fbc1c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}