{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "983568397",
    "entityType": "User",
    "nonce": "0xe73b5913a00c6080fff27bc3aa3ff4632674a1cd5919b336a6fc11a7304f8549",
    "signature": "0x071b1baa8c59c02163e034ee954071213b4ab2757c4c4c9a68c0cac866b0879772e1f4713a9cd27c2154b3dfb4190c43986021c8cbd5d4197316d8a4649fa8691b",
    "signer": "0x5FB1dF0c125C1F3cdda251a598Cb878a0A390F18",
    "userId": "25189733"
  }
}