{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf40193bde90d0b6f6447a2608c07bc0e9856b4ae78c9db0b6d514c1bc2af5109",
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    "signer": "0x6411b372ac40d5d92C8E88B9297D0e761B445Ced",
    "userId": "200402009"
  }
}