{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "388772718",
    "entityType": "User",
    "nonce": "0xf93512d0d25b0afcbcb13ebff7818be32de3399936f994077c889e51c98ed9c9",
    "signature": "0x74740b93d79d0e9d76ffb0f78c0fb94cb1eb2f96a13bdbed06263e14b55eebbf71d15f5fd3c99ef8e154c204962a0a3f2e650e045b4249b3f275e75a3032c1321c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}