{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0xadc4f7960ad32b432111c4d071ae9211d0a9e135fc5f490a29e3fd7a65e3eea5",
    "signature": "0xd30d3d579d11c28fcf471b400a94e3299fae0b22b41f790d1b7ebb3534f162a01f38ff49a6924392312ed5509975db6d6125027334a1fc7fc3338a940c6cd2f21b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}