{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x2a3d0b9376d2d8bece1a68f40ada923aa68dac189ab1f14c0f1ff847344e8416",
    "signature": "0x774757bb07b6348369145c998135b70bc3aa2c88831deb6653c82b9cfc2fa2db6056a72642c8d5b96013b5bb93a3c48e5c93d9c30e0280f885f9655d34bf3eda1c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}