{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "672251661",
    "entityType": "User",
    "nonce": "0x19530becc755a6820ebc1ee94461120785eb7c6a76fb56fa20cb4d150c3b8723",
    "signature": "0x550b2af58367956b05fc23b559bdf1c80a3770167972d1f095562b71ef7dc6f90be5cdbb4ed0855950a816bf602a4ebfd3b60cde004614ad9e747b6346ea70cb1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}