{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123674",
    "entityType": "User",
    "nonce": "0x221537abcdc38d115bed72396f5a8fe1a45fa4d5bb23edcb6a31b9341bcae45a",
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    "signer": "0xB3dF21A0C9a14a4A615A2BE0b74dB4dA132C9909",
    "userId": "554275880"
  }
}