{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "550",
    "entityType": "User",
    "nonce": "0xebb658ee85491854561ac9fc56a3f880088fa074e240b96b370aa15d5619700a",
    "signature": "0xc397a334f5841a5e7cb590ad70355ae17d4618c5c7e2670ec6706de908b15878280d84227727482ff681a57c537ef63ac90b0661b415588b7f7c0846b40143321b",
    "signer": "0x243f92B83d056f818b9b95664A8B7A86805A3E71",
    "userId": "111448"
  }
}