{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xf23c5d5aa1e346ec6a610e044dd922bb2b10578492018f1c6b346f6ae1537955",
    "signature": "0xc7c6a2522969db7cb113e61590270e828a64c662ee144b741f592531954ff9e17c718046bfdd8ea00e996093863a2ca7717e6263782755781dde23e2183e11201b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}