{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301465",
    "entityType": "User",
    "nonce": "0x9c0ec6572a1d18e8e9e09ed627df98de7a351288775744972789bfffde88045a",
    "signature": "0x907ad9841be65be1fc57d4f85b8917d22c746b103077c44c0b11536e5e9f157b483e3d07025e7fb4b3a8b011d992c9ee0a0f66cf54dff09a7ec843cb09ba7df71b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}