{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0xe98a01dd050137e23f13c35eb69e40ee9973e1ddb40fc72027f9d75ec77a06ca",
    "signature": "0x3b120aa33edbc9883022831c34426b86e29e39505528b5abfc5c0b7b5df30e9628d7b4f4e68b1b584c83deb1f7919d968268f061a63f1f50741962797fcdd7cf1c",
    "signer": "0x1f4676E66f85a00704B84876ae1B19DE3eff1F8F",
    "userId": "965243886"
  }
}