{
  "manageEntity": {
    "action": "Save",
    "entityId": "823234399",
    "entityType": "Track",
    "nonce": "0xcfbe2f9ba19a6b25aadab937c06cdc434a528c924531295e93f97ff245eab860",
    "signature": "0x1b7084521adabb50e48caedd3f5fe4a465758c27e06c0c266650b0b7d8a6b0a47a82559e10d953513763a5ec5f8e321cfbbfcfc498133e9be6831e11f04f860f1b",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}