{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xff522c1ba64885591fde6ccd55f9bf51080beac013bef4537ea9a2114c15e1f3",
    "signature": "0x9d1ac2d871cec46230a547c3b03075248c65bb5dd4a877036c74979d654206d93d82284fb1d23e113b22f3698bd43dbc8c994aaf174c22a25d62649f8297e3951b",
    "signer": "0x87e21140ea8479aeDfFfD5DaD69617beA37A6111",
    "userId": "520807103"
  }
}