{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3c509003321e0ace016d51ccb911e458cf77ee3d757e9640a79f66cf4ec7f499",
    "signature": "0x7147bd49c90ba1be515025c728fa8299c3bac135f2801d9b503ee07ac9a00aca7314a7510b58d00a181a8294d274ceb98bffc84b1700d1d283c8690a9281848d1c",
    "signer": "0xA8929E4EA6692c94526a41D6463816F3123D6bc8",
    "userId": "389570575"
  }
}