{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "674606722",
    "entityType": "User",
    "nonce": "0x707f0e63e1a75a41378fc734c2be0b2907eabac182effcf51a8edb0769616ab6",
    "signature": "0x29c1ea8c8ac629a48d64f40c742e1721dd3973a5685064ec1fc66560868ee16833477bd009d0e875fea719878a67cf4fbf364d937c4187873030fd73330218fe1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}