{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4e3eb9c4c644e707a79345a28296ae73272e7e9bf303bcee289050e708434d1d",
    "signature": "0xb13e5ae989d5a346cd1234ba8166deb66df2cf08abcf741a87dc34b04890d45925c39122a69fe5e6ca371205c3f484256fa3d27caeced32322acc0347c0dc3451b",
    "signer": "0x0933F1866303f68872d9455fF4718745a99e1A29",
    "userId": "990707137"
  }
}