{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x38912cdead6281f67d8971276a206044c61c218183898bcfd9a9006f7dc40ac1",
    "signature": "0x6c570756c6b18f0bbc1ef51cc8cb57e21290f7a31cfe0309697a1451bbb34f9d56e8badb67b0ab3fe64ec36eb2f3bdff5b67c1e6cc6d7821853d9f57285ec7fa1c",
    "signer": "0x9cB833243e283F89D7515e148f9C1bD6E1B98581",
    "userId": "755651302"
  }
}