{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xac608e907101ffeecc4d89553351590b5b6609499021286a296a56443258dccd",
    "signature": "0xa67b4a7163c4d88e033cc5a1cebd9b054e5ea388fe47d908480a9e838d4f013368df32887b119404710979f253012f47a427e238a05c426ba4514e8f36463cf01c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}