{
  "manageEntity": {
    "action": "Save",
    "entityId": "552284411",
    "entityType": "Track",
    "nonce": "0xeb1979dbf6fec4026d32cdbd812a34ba77e63d3d13e5d373844622891706c17f",
    "signature": "0x3389e8c08ead7c17cad32f8c009a97eadee220229cdb692870765f6cdf2f561b0969a9bfa4aca61802380c36bca54fc1d5659854c117242071ebbb23747a44f11b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}