{
  "manageEntity": {
    "action": "Save",
    "entityId": "675358906",
    "entityType": "Track",
    "nonce": "0x39a4339a1fe61aee3674dfb34a5f3d3b6a642a40dff893a00b25701f6bcb4efb",
    "signature": "0xd2c3e750725a826d4cb5c4013da518a1b7be4e2c746b9e135d0879d7e3459a2522fbeaa59607abbd6f5e9a8ae7f4b59cafda6d6de71fc6378cf2153976caf93a1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}