{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904729125",
    "entityType": "User",
    "nonce": "0x07489506cdb3e80a4c21161925a53ef6283cfa3b8e6aa11db147bfe95a41b7f2",
    "signature": "0x5d4a56c034ef8609d3bb85d97d9548d113a4bb08d324bb59290f4db6ad3c72483c7f8b9817fb6b723fc0f2b1b23f6b0a7a5d3f35a5c5a182634e252d2e6fd98d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}