{
  "manageEntity": {
    "action": "Save",
    "entityId": "1623165656",
    "entityType": "Track",
    "nonce": "0x65ef0623e132955a834bbf97e27a98d94e8ac1c995be0e52d0d92eeaf5fd1100",
    "signature": "0xeb7bcec918d395398662f0bd30e5d5da3ab7d062be668624140e6a2bf56eb65811bf2708be719b2f26ab7dbb7c146704e0dd3c8cb3eaf3deefffe91f525078651c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}