{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "243194143",
    "entityType": "User",
    "nonce": "0x1838c553b107a8c66bfca1170ff9bfef6fe4cb30afd4c1eb7c95dd236eaf7438",
    "signature": "0x791da41b484156db6f2e9c535f27a240590db6bdb367c4a97b09f3afefedf31768505f96f2748295892dec5320beed4291b97309b4afdf4ec95e4c64896fc4b11c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}