{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748655444",
    "entityType": "User",
    "nonce": "0x2d3b0e19731bcdb8928aa6ec204676dcdb3dbaff4ae530ade96215d31ded325a",
    "signature": "0x080167382a5b51e149834c6c58e0052315b1c3880da954802536d6c01e1ec31340366ec5d3bd8be51ca602b40c866209488849f7a9690d1005bac53ee78a084f1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}