{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x54b52161857b99aff61a4e31c71724107741b3e6bfc460eddf07513485f7f997",
    "signature": "0x60bf2fb840c3cabd912b461ce3c6f8dff93795a02a6e963720340e11af662d586bc7739653b16f0cb5c490bed1d6fe4c91ddf8fb24937055bc6865bd3c9bd4a81b",
    "signer": "0xd2d78f9b62b3956830b58248CcD3C59911Dd6E58",
    "userId": "846847743"
  }
}