{
  "manageEntity": {
    "action": "Save",
    "entityId": "348232242",
    "entityType": "Track",
    "nonce": "0xe80e35979af595d53f8779a1acaff7abee60ea299af7f21490a1734240aa2113",
    "signature": "0xec31cf12e4d2be016a1a16f691e126904908a8b796f3c4889db8087543bf4f662e527e9f569e10aee670920a83bfd98711e8c69e2cffce714fc6aa020a3d6ad01b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}