{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "378229",
    "entityType": "User",
    "nonce": "0xb256612199dc14672658f49a87d73bf5515a48b2a988f08ca5b706a6d3f8af37",
    "signature": "0x00ad8e6614a37b2a0b2d2e4d9a983f8bad79e61897e7392df86a9496712485301429faa1c8750bb1a32acdf5c4a66ee92aec8c75b978260c46467daa9c4b1f101c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}