{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21234",
    "entityType": "User",
    "nonce": "0x92d6d04212d4f703d918d2bd9e7c5570ef8c2ec84450760293f541a89f909bc4",
    "signature": "0x15290b5af413fe14156164b94ee1e57a73d0d34a3dd926b0a8056234cb4bc24e0dd8ef550375d617ad42fe2f863ef082349a79956bbcf15d2d54eb59d04a45cf1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}