{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "553401149",
    "entityType": "User",
    "nonce": "0x39513561a2171fcd33c8b6e106ab2507af5fb6410de8e113a567691abf4d2316",
    "signature": "0x72a615b84405618c0dc562107ab7dc7009442e142a26d06a4b65b8f0dc493bd778e858fe5c8dc9f6243e98b4813ed9b2d881d3bea7d5318f745846922b8fd3761c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}