{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304921883",
    "entityType": "User",
    "nonce": "0x9c6386824f8b4b3db35dd27e505ca56d19cb1fefa26eddaa32ce5dff5c5ac5dd",
    "signature": "0x237e0fc5f89269452d686343cad6e584313f3932bec472637cee8c9d9bc5fcda7236aafc7c2acc88b279379bfe34201f4db3239f8e12b6adc4e9e0707563548c1c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}