{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321073612",
    "entityType": "User",
    "nonce": "0x3b51c4f39cd21510d181294feef96aa2c8186505053c4f5b2a524ea565d4037b",
    "signature": "0xe91a273c01cc325f31fac57baf09452ce995612deecdada33ef0b36ece12d58d03dbadfec8c7575fc59d98eaf10e265074269bebb8e9f4a2604be94d7cffe6111c",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}