{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307951199",
    "entityType": "User",
    "nonce": "0x17a9c22db01e1d66525e1098711c6fd3bb5b53bc9ab4d67e1adb35e1f4ca8b10",
    "signature": "0xf603e4f398a837eedd51ef364192fee00ea8f6ac4d1dbea1861bc007ecf235bc59fa6c37bd937f25d7f1b0af7a55a83ce64a327a00cf76d4072a1b9f9e1a6b8c1c",
    "signer": "0x663FBcbEEC703DA94AA8DD65612bbBE2119F09c4",
    "userId": "605457275"
  }
}