{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x13eb7fa99843df0a576168ce797edd68071ec50d76c89af5ca2d28d9b7ac6321",
    "signature": "0xf83eb668fee1b2fab8a0ced5e9bf3afcd6d56bdd7a1e8ca895e502680b868d2e54d2b34043d54a49389cd1d49615fbef993b4d5291149ab1864de99b84d3c3411c",
    "signer": "0x020D53221d43D039D6B5B3cFc4cB9D9EA350c5dd",
    "userId": "358096342"
  }
}