{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x9cafe2b086df683de691bdc625f65b76918f0f83ffed39054c4950b3bf0e4103",
    "signature": "0x637521cd6ff6418166708e1ce8e6bd0c2d8ad2fdfa384cd869c2a8685b4d1eda609c3b8e973ff7251b8d00328d580e6d02327f6122b0202e39b0bca533dfa1a91b",
    "signer": "0xe58F2D8128273F34a65a7d2cA9D026e70185D1AF",
    "userId": "391333792"
  }
}