{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "375866",
    "entityType": "User",
    "nonce": "0x68ecd5bdcef2541dd496be7e49e300d0a47ac7c76358d78f44e196d3e4770f56",
    "signature": "0x25598c27859771601ed3d3c67234a38f136f9b3f81bbecb5635311657109c4462576f2c9cf2dac83f90e68631e5e5566c7c91996b604b6e43471090c4557e1521c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}