{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x78e7c2350ae478362beee4a855a8f8dc1e9e3e08bef1139bb7ea4bb5563b4020",
    "signature": "0x4d644a9d06f7f97887dbcb9aa9f165a3d50b8cb9e8802b3db4d400e51fadacc51c8065f86b4bcb43019c572a752a86239d1be91366127a4a00648f70658cf9ed1b",
    "signer": "0xD881DDB3BdDa122e9aB73d786bE57e2987493EEF",
    "userId": "23472036"
  }
}