{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf6cfec69fcc48636ded328dfd505cb29a973b60b8dd851a695faaa0ecff08d2d",
    "signature": "0xcc4b761124ab2c3bc8001c5f168fe5d93ccdfa8d7cea6c3ac37e85d0aa95a6ad3717566869319d273f2b56a74d9f9c51d73d594591771b15d795b1bfeb97be301b",
    "signer": "0x73676516aC24232516e3EaD23a00B1fEf8BFaf93",
    "userId": "210324631"
  }
}