{
  "manageEntity": {
    "action": "Save",
    "entityId": "905858075",
    "entityType": "Track",
    "nonce": "0x45deb0f349f0cdb555ce21c8810d73065817efc10539d09fb59f01ca12071f6b",
    "signature": "0x68cfbb4d755bad71bf8c5d854f72bcff9e00848f487a690f0889481fb158aa581f834286a7a99956ca5cfce14172464af780f44828f081df1971d87ba3642ec91c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}