{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "499966629",
    "entityType": "User",
    "nonce": "0x52a0b4da652fec5c68530f4c40f1284a334647595b0011db17635f3560df5285",
    "signature": "0x8559d4c580a8239c996de188ea671003b390ff52091e1b3a39e25bce9d50999f486da27c6befae1f5edde9e48b76bbc747bdff3b7b83bd773b7bd5b035fba22b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}