{
  "manageEntity": {
    "action": "Save",
    "entityId": "428367",
    "entityType": "Track",
    "nonce": "0x19eba57475af833e64b6b7471838a4e75ba9c6d50a9c671c111ac3ad6db42dac",
    "signature": "0xbebc6ced93fc7e9a6e1a9d1143d926a79a1eabffc67fde4514da777af01189d03fa2c479017ba327f23d9871ab277acc132886ec37894eeafa4e82fc28343ba91b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}