{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0b4371a09a8fd6803fc651964563e9818f4658f95c1b1855e2186aa15d01e8c3",
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    "signer": "0xB4997E54aF0150e350d1DA7E5AaB6a45Db31a78f",
    "userId": "888737354"
  }
}