{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1777978",
    "entityType": "User",
    "nonce": "0x4393361c3eeec5608b4a1d59a070fbb1416fcaa6a732794aacc76a8ced506fde",
    "signature": "0x44d5cb302eab4295774c9908f93511f5ec5cbd9f5ca09065c74603f1cf2fc556758d97fc10b32a26ae9968a33619414114d1863e79b0d7f106c2b5a6d66b82461c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}