{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa2b5fe504e3096326ec30708bc4a3c00b7792cc5b0a6abf020a5f569dd550b96",
    "signature": "0x0fe1e375d4d5710a4a251c069f12a75606a8b12ae6e65f16cc1fea25a6c494e70cb013d7cf72d9bf90f28ebcaeb169a62f0eaa5d2a80fc8246358334115b45f01b",
    "signer": "0x21Fd9B00abe46D332aD583DED844CE1b04f07047",
    "userId": "397438294"
  }
}