{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe4a54dcf8a44e44e278878c6142f54123798b7584c001efbda15a08bffba04a6",
    "signature": "0x20e2d204da443548a84de1818b71f450bacf9076df783b2d9990e4cbc469cd70162219b626df403b1500a1b6ed9ad9ae07a403630f603d5182cef901352adce31c",
    "signer": "0x16e1Cec3f961a69130Ce9A743BaDc26776D2a3C0",
    "userId": "762890950"
  }
}