{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51621",
    "entityType": "User",
    "nonce": "0xb50d8dc2ca470e67360af837ea8ea81fd2511c708b3018dbfea721d296d78590",
    "signature": "0x2f8775cd091a04b1f9130ce85f695ec2e9d305300c02fe25d50e4b0491abe99d1b0519751aad6bd3a1f116a436f83286ef1951a7e750ae9637d78b8713ef08221b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}