{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "644286186",
    "entityType": "User",
    "nonce": "0xd0862d68bde254ba47680cbc3f3840236371cc8409f07596742bea4bd99b3450",
    "signature": "0x2f9e5a7d2dd3e2241c72d13209d3a7b4cfdc17f566f2687ae76b7ebf298d2cb33ea55e73965581150a15e37bcfb4baf3313ca7c0a311bcd6fc59391de159b0e31b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}