{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa87aac8384e761c053e6702947730ed517c6339ffa26679067d87c6d0a86c8ae",
    "signature": "0xf53c37f3f116f65fb8856c40ce7821d0b0ca6e4fb7d2bc3a8289ec4df5d8b27f140e709ae1640f14d29a8af2417a8442693608ecdf3602cfd4f29173a2266a1c1c",
    "signer": "0x7E946720e712419058CaBB2D982F088f33824DE6",
    "userId": "543615130"
  }
}