{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "781543844",
    "entityType": "User",
    "nonce": "0xa3552f6525d7239fe734f1a0fef02237e65406d741d9250ea2d5c2aaa0637b85",
    "signature": "0x2e4299ca265fc5632f67e21e5ba2da82e28b164b7f879ef904178998caa556cc2c42c9402f2abb6dccb9656320e4e03b1c17c63db17e937fa6e4db09cdfeaaea1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}