{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x84e37f7a280250572efcf2f473fb5e03fc72a8095f2534bb578b998d203a6278",
    "signature": "0x0a728221cd9af73ef7e6ecd3ec1333f528ed803f96e54e8c3c945018cf0f97bf47f950c43a7466503a659e1884b6bd02d29650ca9cc33a589a53092dbe7c04af1c",
    "signer": "0x670E4517CCB95F2b528b0D6B0E50DC7a0f51f838",
    "userId": "555604608"
  }
}