{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe38e08275b524e0b481475378e3fe2d4d037f3c373a76c93585b3290ac738d76",
    "signature": "0x4a79d43be028bcfdcfb9033694ff3eeab50459a84fff5972146c2c3405f44a0d71cf5efedcd0a64ad0e94845c71b4c2facd9b69fd1a5601ae60dfab98e3b4c0f1c",
    "signer": "0x3f68c4c8760ed398360Fb1dE366BCB66d2201E09",
    "userId": "817199487"
  }
}