{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1337",
    "entityType": "User",
    "nonce": "0xbbc81330357e5f6d050897868817be40471c9317fef0ae829e42b038e2b40f90",
    "signature": "0x2fc4d687d4a2d70bf0453eb92d64b236d5b7124c4de1a209f202665814a27cdf7207057982f6f9d1ba4ca7bd0a45e0d621bd03089350f5e569f71faf815989001c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}