{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "821853407",
    "entityType": "User",
    "nonce": "0x340e512437f1cc29f716a0bd3788b10ec27ddad7d917b486298976b8f98e383e",
    "signature": "0x7ba4bdcca50d369c8d93d54b54474c8e1a1e56ff5bd298ae437b5b757a8bae053d5686c38d2f224e0f7da4e83b5a5c5808fed57c040710a8b0937075309390961b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}