{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354601",
    "entityType": "User",
    "nonce": "0xcfb5f36df8f87f558b98edbbb8a492db85ed602326332222415e8089f1ffe782",
    "signature": "0xd5ba55265d926d5791f1e43f9ccf5d2a2717b6ba693bd7ff5f54a838399b89884cc148e4bc380cddeced2517e457cafcd4c9eb2af4f5167051d0a17311f2ff7d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}