{
  "manageEntity": {
    "action": "Save",
    "entityId": "1454943317",
    "entityType": "Track",
    "nonce": "0xb3adb780b48b80bff4e6289ac4e6dafd20463709c5dd63e07d9fb1d326f08e67",
    "signature": "0x04022536d486ed993b30f9f98585311579e486ddd749856e0f3805bd8bf14a3032f9f1304f3e807b357572b7cb35358121f9872b020322625f1844f218349d461c",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}