{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648071502",
    "entityType": "User",
    "nonce": "0xdbda75f5e1337de8e4741a15778bf0787b7fd505e25af38b5e0aea5c9c22aa0e",
    "signature": "0x593fd32d4635d948b6ce48f1fe11161abf260c4233ef3888c20783a8409150987d3fd7b856c846f9f9680a0bb1eccbdd1783e8752c98c8ae0ebd64d2c2df3e851c",
    "signer": "0x65EB59bb6C92a37Ff6b3c51d34c0aD3607F751cb",
    "userId": "305838"
  }
}