{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748896412",
    "entityType": "User",
    "nonce": "0xcec89579081ce64f967eaa34d900eaab6ba821675a7cfbf6f311dc7b7e79f9dc",
    "signature": "0xc1d084b8dae7f9e097a7dcd230b707ca9088503bd21007d04f1210f107d99e8043503f56da25e60c21303785e4e1eea100883740314e6a58ab030f1553206a7f1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}