{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "870684573",
    "entityType": "User",
    "nonce": "0xb18a2bfad61bdeacf85b0af98d52a7fbd48305aa977338235d06a195b93723aa",
    "signature": "0x9148bfe0f7ce6009aef29d612779339c6b5319d8fdc857af310579921cdbce0952f8f3ea6be1bf7b88094b6161a4d75169583bb0afc63ed3fa4b4d69a43ab8181c",
    "signer": "0x866CB73184a8420C302e3850B610761F882C4DDE",
    "userId": "166428182"
  }
}