{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xb8a16e059b6bb2ccef30a6e39b3ed077b5f851002dbd03e4a95b0ef44137179f",
    "signature": "0xf433d31bc3ec8b573d1d9612e6a08451a637a1c31688f854f13ea29c1d34ad5b614b0dcf14137459e4a000e3c67f19b21673ae96e95c254efae67b4836caa61a1c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}