{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "897648338",
    "entityType": "User",
    "nonce": "0x73b3dd85ad36874b5d10684920ad89e7f57577ed30ab0e40cbe0dc1f707d5fc1",
    "signature": "0x0d1e93544778c09e3994c8ffdec8f5ad0b957bdb334868ed23699b91b9758e3d687865d506cc533aed471ebeb7cb62ffb0d57f8f12e2c674f38e85e631f47a211c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}