{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "137605",
    "entityType": "User",
    "nonce": "0xdd7300ed9cf0c1b1a2406ecf8397befdcb9806a1c89a7ea19b103d13d1c0548a",
    "signature": "0xd77e37e2b5fe70a128fe1b924f3bac4ef7e88a10334b5941bc8b2c800c1b77cb05163ff4c9c7bb042dcc15b2a6d33359685639130747880e7fd667c72b3a32591b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}