{
  "manageEntity": {
    "action": "Save",
    "entityId": "947394",
    "entityType": "Track",
    "nonce": "0x574a391ef8097ad0d77be2802694df6ffc67f969d59aece4285e22d538b55e60",
    "signature": "0xc741e5704d2c04402bf827fab6c78a98d31d188ead87b577e3e4da05fb59dfc2622bd24fa32c078fc681a2cb6520a58d09a03288fb35279ba30029055b16308d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}