{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "406225571",
    "entityType": "User",
    "nonce": "0x37b238aa621119425a72b0a34518815494255ac8a035d462741bbf89cbc5ffc8",
    "signature": "0x1d5568769942fd35f21536d1b3cea03c94144473ad3f4abf3aeaa6ee7a848fab4fbea664aff16e05fde12f6d677387cb81df06e3cf3023b73f24b32ce4b3d39f1c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}