{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xafdb8b9f278ec0998c7e4698658ba196d4bf1b621ec5276560a50cc7d274a3ab",
    "signature": "0xec62341ac51d5ff70e76dbd28694acdee083f82ce6cb1571e6d215035013aabb411f744fda0952883b3e234c00a92dc76715585b76f7a97a7d5cf3fec1ef9c3a1c",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}