{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "17403",
    "entityType": "User",
    "nonce": "0x0f5949bf3d846268de78aa3768d2c81fb6f0801a7feb133ff9e019555a5bbb41",
    "signature": "0x542090e122069c0cc4daaf4aca9a6a259d422ba78ea73dba8cc84238b3beea286753e402aeffc72c1ca17a56cf5ca1d02482666c8ca01bb9793c44713f7dc0261c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}