{
  "manageEntity": {
    "action": "Save",
    "entityId": "766729865",
    "entityType": "Track",
    "nonce": "0x737c5f3fbd46dc5c29dd8249863e6c30296eed55720d63511f8bcf2de92c465f",
    "signature": "0x27b7cf316612614ccaf11b05fb714e41b6800e326df69a378f2457c655f0b2d96f604700de25b5e798889ca7161f3614c7e918cbfc9e55d6abbb856900cc5eae1c",
    "signer": "0x0444D342667207352B17fd469487F22596Bf0588",
    "userId": "2044"
  }
}