{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "328894",
    "entityType": "User",
    "nonce": "0xb9cfeb31bf7552eedb8aec433acb768cfbe7d071eca291581b37dca0310ca815",
    "signature": "0x6e42535aa805b1613a688ba398d591b61a1bdf1720bb841f230b0252062e565e5c487a1ee8cb7a0cc63e0c9f4f3e455ac6c356fed31e797250af2fa07854d3f21b",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}