{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638543",
    "entityType": "User",
    "nonce": "0xa53c2611935f16817e2799920e2b8227b3a58bd2d9c9a67b9eaf902a57951a83",
    "signature": "0x33ecf9dd9afd055946ab05f6d51497178801882b85821103fb5dc36efb2615ce7f0eab0921c497b370bd8aee07a301e59330e90332b27a18ea4a91d54b824dac1c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}