{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123597",
    "entityType": "User",
    "nonce": "0x4db8a7ebfebb8061bd84073b548c853e733816cbc9e71739d618fb6c0f50601b",
    "signature": "0x2edb1131d7ce65fcd37ba248817aad28e0857dc37f0a5f1429e851ef293e10f90fde4589bebedb60376bc3fcc8de4b82b6c10168471f999b0749bfe29792a6721c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}