{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0b205bd4cfd4392b4dd7bba57d470ecac64130c1439a66625d866fbeaa717917",
    "signature": "0xe4582c4632ad9b3eaaba4db7ca4218d8cdcb16a4850bbb588cb5d18fc526348633c4996f2b645143857c1cf7c78c5c42253043772c76348c9604012b470218b81c",
    "signer": "0x905737799FC3f6BF9Be7db39A108fD35B9203B31",
    "userId": "423753950"
  }
}