{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "683609933",
    "entityType": "User",
    "nonce": "0x2144a4cbb60349102bbd3d743f62b14e3ca2a7c497fd8655be4e951fc4b2655c",
    "signature": "0x5b37b1e9df3e2022bfa8c2c070a1022ff652a905dfed9dd5cce37851935f93ba373a1e78308d62700454a2b43d8e67ec49743534e3b5c6c6f334fef266333af91b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}