{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "663625456",
    "entityType": "User",
    "nonce": "0xca7b01c5217268ae555a4ba2ee512e55a9fc93d4a9b33871fb538541cfe56111",
    "signature": "0xcde741ee55ba7e50e5d3c6874ccaa4322f91907a10ce58a242ee254a73e7c94c5a73e57df8990958bd791b1f8647749739fb3adc07fea0b530ff7e55cc2f4b571c",
    "signer": "0x7101d3D7F09Ca73A23b495313a1055968bcb94Ce",
    "userId": "347769544"
  }
}