{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321616",
    "entityType": "User",
    "nonce": "0xcee735de1dcfadc384bef47a1e5ee4fe218145c7a86010843f87a89442d36ce5",
    "signature": "0xde728d6e3b110d7c150abe172eda2e3bb3fb326e8f4d2a82df1b9c08c4e6b9215d70e905882e46f915523e87be711a50dabd4de9a3ca593e7180ca0dfed3b4f21b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}