{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x21e502139a7dbca7bc177ddc9594bcb37ed5b6471d9fc41b9f8523fcab4bfa8d",
    "signature": "0x250f37487204ee69ab506294cc02827bebef6d7047fab7af3809508ef9403e6f0f6d5820b28511628ad849fe603f7e78c124f2eb100de67e98f529c42befc5151b",
    "signer": "0x7cBf9C818e64D0e7E0f624C52725f97CE9E2C312",
    "userId": "117746616"
  }
}