{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "105873",
    "entityType": "User",
    "nonce": "0xfec12721b022ba53d126c905ba78f6584221be34f7a5873b4c8351931bd150ea",
    "signature": "0xb1463c569975e66d6e06bd6ecc474fa0a0cc80a5aead1dc86027cd68585d54697b5de27b9eafea381fe2564216331a279485a574b26a328403b2efcc5c29cc8e1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}