{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "687676",
    "entityType": "User",
    "nonce": "0x28b583513f18dc7b1bc807303648ffda414320d6e7343faef60447d4952a5508",
    "signature": "0xc889b41d9220fe371dd1da9c76c1a04e7c4b3a128b58c8fcbd97c726ef27bf4651399a44549a7bb2c43c2f04313ac1f899c7f2232566e4c33a48d6316385ac521b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}