{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638733607",
    "entityType": "User",
    "nonce": "0x38f8a6f8d9c8387c689360db9a1818845e3040394cec9c641df69dd2cd61f857",
    "signature": "0x20695fb75fe9b207a9b3d6e3c27045f792c42a1dbabe8f29308b4269bd9905ae0c1abe99351876e27253ed204af99017b661f213af83eb48532ffac60b94827e1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}