{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x64617386c7f81c3014abd90b2dcfd368e6083a51caecdd97ff11fc60b3f8bc46",
    "signature": "0x0d6e3db3e84d869f10d0f8b1dcebab9f227a5d7d25d52032514dac3c6517759e7bdc691dfe01dbcf46941589ec8417cc7838d7ad111d0921b4fddac3fd4a1b101b",
    "signer": "0xfE3F8897Cb342Fe4986Eb4db3e9C86c6bE6eA694",
    "userId": "548022573"
  }
}