{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5266c3039a06f5bbe69270162a6aea06ed99cba46d9ef77ac90967ed568fd413",
    "signature": "0x4d3980a828f63ba5985f12548b7bb5285d0df7c035e38ade313dca193dc51c5a681a77e2a95fad8472c383471149bac68d3b8345ea3350c97cdbebe44a12334d1b",
    "signer": "0xF140e464284e38a817eb2D1Cc258c9bf93068853",
    "userId": "408163590"
  }
}