{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390804",
    "entityType": "User",
    "nonce": "0xd616777502e581e0d02e006eb9e8bb3014ba91f710196e52cbe03addc1e09d29",
    "signature": "0xf19eccd048b792b48f72049c253f2011c6f99b388e0d284c4f488ece41372ead3e7ff067b02e97eb183486ee0b05d7590049dfebd146306c5630bc7f23c576ec1c",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}