{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15210",
    "entityType": "User",
    "nonce": "0xf4b98d700190317da6ec225b98006238c5f4d3f3ec78fbacb46014a3ba981d30",
    "signature": "0xd8d73ff0389f49d4cb55264457d8a529bbd936a32111919d78b8f7efbb39b4a84d9fd6d0f89e09d58e60c94d8a8afca010f84570e55011233827926db98a41511b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}