{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "342017819",
    "entityType": "User",
    "nonce": "0x7fc6a2c48ccdd5c0f28132f6d3b01f417269fe12f9cda662064bcbd77a5e9a8f",
    "signature": "0x749b7e0599ec3ceec8578b7272ec1560b6c47c57042dd68b1580eab0914dae575e76e1f85e421a0305eb0c12f07f8213ad90b9599bb0c7feba4350dfab8bab1a1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}