{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "138040",
    "entityType": "User",
    "nonce": "0x3456e5741c1acff234b891a98f72bd3d67bb65d1b7160887eec1a69a65ad7a49",
    "signature": "0xd138f7eab23e01ae2702ab0c78088ffeb9bf68b30b5518e61c0e2727dcc1824a7c48b2e6ff9a2ba4c555f147bc03152a42db781f13b89b2188d429af1965214c1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}