{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648802251",
    "entityType": "User",
    "nonce": "0x7ff3ca6260b7602c2361e5f9e1bab62601ad4ca04cadf624f8c4de3ba1ac49e0",
    "signature": "0x0e9490e8d59386dc4279a9c1bb90c9c279ed6c6ebc97ddff7bd33c802989a7f5336c701585e44aa1927c697d8cf4363f402b1116d11598667ba0f8cadebf76191c",
    "signer": "0x8d9D00A94c3B1C9992e3CA4386AbBC6345B2E876",
    "userId": "396658415"
  }
}