{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xce7724e176708413703b910f3503870b709c5cb5dd700b1b8692c7918dc9c706",
    "signature": "0x53df093c261353187dbcb8cdbb98143673be912e8f81b59bf62f242eeef4f1cf19ff01ce3d5ff89f2fa1538b68d95a4052f152446e3aa777ec9a2f24b1eceba21b",
    "signer": "0x7a78569646ADa00a4d555F20fA48e9cDb9ef14F5",
    "userId": "333304008"
  }
}