{
  "manageEntity": {
    "action": "Save",
    "entityId": "1186045106",
    "entityType": "Track",
    "nonce": "0x15ae4d7121454c3168c31262d353ce633bcb3b123739f4a5f8faa1407a15cd77",
    "signature": "0x887739b4e47aae22b98830c62f1844184ce51593dcc40985bfc451a0a3119acb095639c86d80e5c2ecc2b023d5a4078f1f17b0b10ab0b76c1f4b26a077a5f55e1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}