{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x45cffd35b176fb1a5e0ac1f73f2668e1a3befa6439b8424da102d2e62439a352",
    "signature": "0x9a41ce5de4873d7764d5935fca75852c295d2552f0a7955cc1c715522a158d246c41acca142f0c063db3f8a089d237521a0ff237ce6b69f2aabbcb993901d24b1b",
    "signer": "0xFf2437389375Ba241D046fEb32cdfb9e1B3f4Cc3",
    "userId": "920962897"
  }
}