{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe8c34c94ce18f764600c72932530708476af5d0970d18e35f8f87c0ad86b8be8",
    "signature": "0xad968761e3bb6f96c9537c0f0c1616d39e5759ea66b876668606e3361766c45d7e03ad83195a65953de6947845a6c514c3b5d9803d948fd81b5d738e13c8c53d1c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}