{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "531750816",
    "entityType": "User",
    "nonce": "0x763003bce2b80bb580d95838bb3f9af2be53171079f4d9bfdda8bc40a3a72e37",
    "signature": "0xeb10027e42b5017680cde1ea0b4b1635bdb7f2c45648af343af845cfde4d95a868d9a414e3e2e5a8729b26fbdf3e0c432451806275aef870cac6453c6964d02b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}