{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1873428",
    "entityType": "User",
    "nonce": "0x5796391a6d40fe50b2601f7b817fd8c77156452d5bf61704929f3a4da1a08503",
    "signature": "0x567a26293507c139ab0918a7b7ed8aff3e8ef8878cbfdd036b3476e0494c872b5188a5760ae1723b4fef6d00c9bf0189912b9e6823668561d47bf4620a18cbf11c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}