{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343542",
    "entityType": "User",
    "nonce": "0xa45ade0a46192a047c17a6a3dd5ccb14b9cf3a3db0dc6712957726c416a219bd",
    "signature": "0xe0028c50cdee5fdce9fd2e6f8ad42e74a7b13a65247e8abe9c1f0aa36218af0f350e670d3d6d5a91f4325d49f8fce6aafa2a029e7485ca89c67beb8780bb50ce1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}