{
  "manageEntity": {
    "action": "Save",
    "entityId": "1467088330",
    "entityType": "Track",
    "nonce": "0x4519a30deb7f9cabc054d151fc4ec628a496c99bb9c2937c1109122efb0ac747",
    "signature": "0xeae298e169533dc97670e7dcad60fde70c984bfa758c577f001ef6be8f9f04123bf434afb06ef909ae92fc91e00569b98877f65043e644a053fe8676206dc9d31b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}