{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xb041af5329b19597c38bf75163c42ff19ddd67d102bb7eedec38d52919c74ce5",
    "signature": "0x57130b4d32c4041e274a2422b989ce23eb5a135aebda4576998e394be3d9b2e34c265627284016973060f304f5f7f882f164baf5eb79a1e26500065348ee64f01c",
    "signer": "0x4b6B842af75cfAF1fb1Bd7B073C47b1001242a5C",
    "userId": "539898390"
  }
}