{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816274",
    "entityType": "User",
    "nonce": "0x1526d7631059d695b2d9847783da4c9875dd589f2bcc1971c5ab48c6d9d359ea",
    "signature": "0x5a4829216a2ce20f15e9bec8cb74a51ab47a22b01bb52faa78df9adf458062b15fa109a5d711ccd99caf1f20b9d7484fdaa7b71ca4a6c5219afdc84ba8eaba2a1b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}