{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0ab753c3ef170440c4f9b108aebdb00aae19b724ef0173e011f1991628832b6e",
    "signature": "0xf454b2e759a0333f04c2c238a358b82d477792ab64472e5d54d450a91da705461c1c781ca9ce1cc97d9ebb8da26b524d41ee822ff7bf5417907ce56eec2235e81b",
    "signer": "0x1D5Ec5DF45AD50E5CB2ab1D3BB9d706596Cf6cac",
    "userId": "547566708"
  }
}